[{"status":"public","abstract":[{"lang":"eng","text":"We study the problem of learning controllers for discrete-time non-linear stochastic dynamical systems with formal reach-avoid guarantees. This work presents the first method for providing formal reach-avoid guarantees, which combine and generalize stability and safety guarantees, with a tolerable probability threshold $p\\in[0,1]$ over the infinite time horizon. Our method leverages advances in machine learning literature and it represents formal certificates as neural networks. In particular, we learn a certificate in the form of a reach-avoid supermartingale (RASM), a novel notion that we introduce in this work. Our RASMs provide reachability and avoidance guarantees by imposing constraints on what can be viewed as a stochastic extension of level sets of Lyapunov functions for deterministic systems. Our approach solves several important problems -- it can be used to learn a control policy from scratch, to verify a reach-avoid specification for a fixed control policy, or to fine-tune a pre-trained policy if it does not satisfy the reach-avoid specification. We validate our approach on $3$ stochastic non-linear reinforcement learning tasks."}],"main_file_link":[{"url":"https://arxiv.org/abs/2210.05308","open_access":"1"}],"day":"29","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.48550/ARXIV.2210.05308","department":[{"_id":"KrCh"},{"_id":"ToHe"}],"date_created":"2023-11-24T13:10:09Z","date_published":"2022-11-29T00:00:00Z","type":"preprint","license":"https://creativecommons.org/licenses/by-sa/4.0/","year":"2022","article_processing_charge":"No","oa_version":"Preprint","arxiv":1,"corr_author":"1","project":[{"call_identifier":"H2020","grant_number":"863818","name":"Formal Methods for Stochastic Models: Algorithms and Applications","_id":"0599E47C-7A3F-11EA-A408-12923DDC885E"},{"_id":"62781420-2b32-11ec-9570-8d9b63373d4d","name":"Vigilant Algorithmic Monitoring of Software","grant_number":"101020093","call_identifier":"H2020"},{"grant_number":"665385","call_identifier":"H2020","name":"International IST Doctoral Program","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"}],"author":[{"orcid":"0000-0002-4681-1699","first_name":"Dorde","id":"294AA7A6-F248-11E8-B48F-1D18A9856A87","full_name":"Zikelic, Dorde","last_name":"Zikelic"},{"full_name":"Lechner, Mathias","last_name":"Lechner","first_name":"Mathias","id":"3DC22916-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Henzinger, Thomas A","last_name":"Henzinger","first_name":"Thomas A","orcid":"0000-0002-2985-7724","id":"40876CD8-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Chatterjee","full_name":"Chatterjee, Krishnendu","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4561-241X","first_name":"Krishnendu"}],"language":[{"iso":"eng"}],"publication":"arXiv","citation":{"short":"D. Zikelic, M. Lechner, T.A. Henzinger, K. Chatterjee, ArXiv (n.d.).","ieee":"D. Zikelic, M. Lechner, T. A. Henzinger, and K. Chatterjee, “Learning control policies for stochastic systems with reach-avoid guarantees,” <i>arXiv</i>. .","ista":"Zikelic D, Lechner M, Henzinger TA, Chatterjee K. Learning control policies for stochastic systems with reach-avoid guarantees. arXiv, 2210.05308.","apa":"Zikelic, D., Lechner, M., Henzinger, T. A., &#38; Chatterjee, K. (n.d.). Learning control policies for stochastic systems with reach-avoid guarantees. <i>arXiv</i>. <a href=\"https://doi.org/10.48550/ARXIV.2210.05308\">https://doi.org/10.48550/ARXIV.2210.05308</a>","chicago":"Zikelic, Dorde, Mathias Lechner, Thomas A Henzinger, and Krishnendu Chatterjee. “Learning Control Policies for Stochastic Systems with Reach-Avoid Guarantees.” <i>ArXiv</i>, n.d. <a href=\"https://doi.org/10.48550/ARXIV.2210.05308\">https://doi.org/10.48550/ARXIV.2210.05308</a>.","ama":"Zikelic D, Lechner M, Henzinger TA, Chatterjee K. Learning control policies for stochastic systems with reach-avoid guarantees. <i>arXiv</i>. doi:<a href=\"https://doi.org/10.48550/ARXIV.2210.05308\">10.48550/ARXIV.2210.05308</a>","mla":"Zikelic, Dorde, et al. “Learning Control Policies for Stochastic Systems with Reach-Avoid Guarantees.” <i>ArXiv</i>, 2210.05308, doi:<a href=\"https://doi.org/10.48550/ARXIV.2210.05308\">10.48550/ARXIV.2210.05308</a>."},"publication_status":"draft","article_number":"2210.05308","title":"Learning control policies for stochastic systems with reach-avoid guarantees","tmp":{"image":"/images/cc_by_sa.png","name":"Creative Commons Attribution-ShareAlike 4.0 International Public License (CC BY-SA 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","short":"CC BY-SA (4.0)"},"month":"11","oa":1,"external_id":{"arxiv":["2210.05308"]},"OA_place":"repository","ec_funded":1,"date_updated":"2026-04-07T13:27:56Z","related_material":{"record":[{"relation":"later_version","status":"public","id":"14830"},{"relation":"dissertation_contains","id":"14539","status":"public"}]},"_id":"14600"},{"date_created":"2023-11-24T13:22:30Z","date_published":"2022-05-24T00:00:00Z","type":"preprint","doi":"10.48550/arXiv.2205.11991","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","department":[{"_id":"KrCh"},{"_id":"ToHe"}],"day":"24","status":"public","abstract":[{"lang":"eng","text":"In this work, we address the problem of learning provably stable neural\r\nnetwork policies for stochastic control systems. While recent work has\r\ndemonstrated the feasibility of certifying given policies using martingale\r\ntheory, the problem of how to learn such policies is little explored. Here, we\r\nstudy the effectiveness of jointly learning a policy together with a martingale\r\ncertificate that proves its stability using a single learning algorithm. We\r\nobserve that the joint optimization problem becomes easily stuck in local\r\nminima when starting from a randomly initialized policy. Our results suggest\r\nthat some form of pre-training of the policy is required for the joint\r\noptimization to repair and verify the policy successfully."}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2205.11991"}],"ec_funded":1,"OA_place":"repository","date_updated":"2026-04-07T13:27:56Z","related_material":{"record":[{"status":"public","id":"14539","relation":"dissertation_contains"}]},"_id":"14601","title":"Learning stabilizing policies in stochastic control systems","oa":1,"month":"05","external_id":{"arxiv":["2205.11991"]},"author":[{"id":"294AA7A6-F248-11E8-B48F-1D18A9856A87","first_name":"Dorde","orcid":"0000-0002-4681-1699","last_name":"Zikelic","full_name":"Zikelic, Dorde"},{"last_name":"Lechner","full_name":"Lechner, Mathias","id":"3DC22916-F248-11E8-B48F-1D18A9856A87","first_name":"Mathias"},{"id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","first_name":"Krishnendu","orcid":"0000-0002-4561-241X","last_name":"Chatterjee","full_name":"Chatterjee, Krishnendu"},{"id":"40876CD8-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas A","orcid":"0000-0002-2985-7724","last_name":"Henzinger","full_name":"Henzinger, Thomas A"}],"language":[{"iso":"eng"}],"publication":"arXiv","publication_status":"draft","article_number":"2205.11991","citation":{"mla":"Zikelic, Dorde, et al. “Learning Stabilizing Policies in Stochastic Control Systems.” <i>ArXiv</i>, 2205.11991, doi:<a href=\"https://doi.org/10.48550/arXiv.2205.11991\">10.48550/arXiv.2205.11991</a>.","ama":"Zikelic D, Lechner M, Chatterjee K, Henzinger TA. Learning stabilizing policies in stochastic control systems. <i>arXiv</i>. doi:<a href=\"https://doi.org/10.48550/arXiv.2205.11991\">10.48550/arXiv.2205.11991</a>","chicago":"Zikelic, Dorde, Mathias Lechner, Krishnendu Chatterjee, and Thomas A Henzinger. “Learning Stabilizing Policies in Stochastic Control Systems.” <i>ArXiv</i>, n.d. <a href=\"https://doi.org/10.48550/arXiv.2205.11991\">https://doi.org/10.48550/arXiv.2205.11991</a>.","ista":"Zikelic D, Lechner M, Chatterjee K, Henzinger TA. Learning stabilizing policies in stochastic control systems. arXiv, 2205.11991.","apa":"Zikelic, D., Lechner, M., Chatterjee, K., &#38; Henzinger, T. A. (n.d.). Learning stabilizing policies in stochastic control systems. <i>arXiv</i>. <a href=\"https://doi.org/10.48550/arXiv.2205.11991\">https://doi.org/10.48550/arXiv.2205.11991</a>","ieee":"D. Zikelic, M. Lechner, K. Chatterjee, and T. A. Henzinger, “Learning stabilizing policies in stochastic control systems,” <i>arXiv</i>. .","short":"D. Zikelic, M. Lechner, K. Chatterjee, T.A. Henzinger, ArXiv (n.d.)."},"year":"2022","article_processing_charge":"No","corr_author":"1","arxiv":1,"oa_version":"Preprint","project":[{"call_identifier":"H2020","grant_number":"101020093","_id":"62781420-2b32-11ec-9570-8d9b63373d4d","name":"Vigilant Algorithmic Monitoring of Software"},{"name":"Formal Methods for Stochastic Models: Algorithms and Applications","_id":"0599E47C-7A3F-11EA-A408-12923DDC885E","grant_number":"863818","call_identifier":"H2020"},{"call_identifier":"H2020","grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","name":"International IST Doctoral Program"}]},{"type":"preprint","date_created":"2024-03-08T09:54:20Z","date_published":"2022-12-06T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","department":[{"_id":"HeEd"}],"day":"06","status":"public","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2212.03121"}],"abstract":[{"text":"Given a locally finite set A⊆Rd and a coloring χ:A→{0,1,…,s}, we introduce the chromatic Delaunay mosaic of χ, which is a Delaunay mosaic in Rs+d that represents how points of different colors mingle. Our main results are bounds on the size of the chromatic Delaunay mosaic, in which we assume that d and s are constants. For example, if A is finite with n=#A, and the coloring is random, then the chromatic Delaunay mosaic has O(n⌈d/2⌉) cells in expectation. In contrast, for Delone sets and Poisson point processes in Rd, the expected number of cells within a closed ball is only a constant times the number of points in this ball. Furthermore, in R2 all colorings of a dense set of n points have chromatic Delaunay mosaics of size O(n). This encourages the use of chromatic Delaunay mosaics in applications.","lang":"eng"}],"related_material":{"record":[{"relation":"later_version","id":"20456","status":"public"},{"id":"15094","status":"public","relation":"dissertation_contains"}]},"date_updated":"2026-04-07T12:58:47Z","_id":"15090","ec_funded":1,"OA_place":"repository","oa":1,"month":"12","external_id":{"arxiv":["2212.03121"]},"title":"On the size of chromatic Delaunay mosaics","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"publication":"arXiv","article_number":"2212.03121","publication_status":"draft","citation":{"short":"R. Biswas, S. Cultrera di Montesano, O. Draganov, H. Edelsbrunner, M. Saghafian, ArXiv (n.d.).","ieee":"R. Biswas, S. Cultrera di Montesano, O. Draganov, H. Edelsbrunner, and M. Saghafian, “On the size of chromatic Delaunay mosaics,” <i>arXiv</i>. .","apa":"Biswas, R., Cultrera di Montesano, S., Draganov, O., Edelsbrunner, H., &#38; Saghafian, M. (n.d.). On the size of chromatic Delaunay mosaics. <i>arXiv</i>.","ista":"Biswas R, Cultrera di Montesano S, Draganov O, Edelsbrunner H, Saghafian M. On the size of chromatic Delaunay mosaics. arXiv, 2212.03121.","ama":"Biswas R, Cultrera di Montesano S, Draganov O, Edelsbrunner H, Saghafian M. On the size of chromatic Delaunay mosaics. <i>arXiv</i>.","chicago":"Biswas, Ranita, Sebastiano Cultrera di Montesano, Ondrej Draganov, Herbert Edelsbrunner, and Morteza Saghafian. “On the Size of Chromatic Delaunay Mosaics.” <i>ArXiv</i>, n.d.","mla":"Biswas, Ranita, et al. “On the Size of Chromatic Delaunay Mosaics.” <i>ArXiv</i>, 2212.03121."},"author":[{"full_name":"Biswas, Ranita","last_name":"Biswas","first_name":"Ranita","orcid":"0000-0002-5372-7890","id":"3C2B033E-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Cultrera di Montesano, Sebastiano","last_name":"Cultrera di Montesano","orcid":"0000-0001-6249-0832","first_name":"Sebastiano","id":"34D2A09C-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Ondrej","orcid":"0000-0003-0464-3823","id":"2B23F01E-F248-11E8-B48F-1D18A9856A87","full_name":"Draganov, Ondrej","last_name":"Draganov"},{"last_name":"Edelsbrunner","full_name":"Edelsbrunner, Herbert","id":"3FB178DA-F248-11E8-B48F-1D18A9856A87","first_name":"Herbert","orcid":"0000-0002-9823-6833"},{"first_name":"Morteza","id":"f86f7148-b140-11ec-9577-95435b8df824","full_name":"Saghafian, Morteza","last_name":"Saghafian"}],"language":[{"iso":"eng"}],"corr_author":"1","arxiv":1,"oa_version":"Preprint","project":[{"_id":"266A2E9E-B435-11E9-9278-68D0E5697425","name":"Alpha Shape Theory Extended","call_identifier":"H2020","grant_number":"788183"},{"_id":"0aa4bc98-070f-11eb-9043-e6fff9c6a316","name":"Persistent Homology, Algorithms and Stochastic Geometry","grant_number":"I4887"},{"_id":"268116B8-B435-11E9-9278-68D0E5697425","name":"Mathematics, Computer Science","grant_number":"Z00342","call_identifier":"FWF"}],"year":"2022","article_processing_charge":"No"},{"keyword":["Molecular Biology","Structural Biology"],"day":"19","main_file_link":[{"url":"https://doi.org/10.1038/s41594-022-00891-8","open_access":"1"}],"abstract":[{"text":"RNA modifications are widespread in biology and abundant in ribosomal RNA. However, the importance of these modifications is not well understood. We show that methylation of a single nucleotide, in the catalytic center of the large subunit, gates ribosome assembly. Massively parallel mutational scanning of the essential nuclear GTPase Nog2 identified important interactions with rRNA, particularly with the 2′-<jats:italic>O</jats:italic>-methylated A-site base Gm2922. We found that methylation of G2922 is needed for assembly and efficient nuclear export of the large subunit. Critically, we identified single amino acid changes in Nog2 that completely bypass dependence on G2922 methylation and used cryoelectron microscopy to directly visualize how methylation flips Gm2922 into the active site channel of Nog2. This work demonstrates that a single RNA modification is a critical checkpoint in ribosome biogenesis, suggesting that such modifications can play an important role in regulation and assembly of macromolecular machines.","lang":"eng"}],"status":"public","date_published":"2022-12-19T00:00:00Z","quality_controlled":"1","publisher":"Springer Nature","date_created":"2024-03-20T10:41:45Z","scopus_import":"1","type":"journal_article","article_type":"original","doi":"10.1038/s41594-022-00891-8","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1545-9985"],"issn":["1545-9993"]},"author":[{"last_name":"Yelland","full_name":"Yelland, James N.","first_name":"James N."},{"last_name":"Bravo","full_name":"Bravo, Jack Peter Kelly","id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e","orcid":"0000-0003-0456-0753","first_name":"Jack Peter Kelly"},{"first_name":"Joshua J.","last_name":"Black","full_name":"Black, Joshua J."},{"first_name":"David W.","full_name":"Taylor, David W.","last_name":"Taylor"},{"full_name":"Johnson, Arlen W.","last_name":"Johnson","first_name":"Arlen W."}],"publication_status":"published","citation":{"ieee":"J. N. Yelland, J. P. K. Bravo, J. J. Black, D. W. Taylor, and A. W. Johnson, “A single 2′-O-methylation of ribosomal RNA gates assembly of a functional ribosome,” <i>Nature Structural &#38; Molecular Biology</i>, vol. 30. Springer Nature, pp. 91–98, 2022.","short":"J.N. Yelland, J.P.K. Bravo, J.J. Black, D.W. Taylor, A.W. Johnson, Nature Structural &#38; Molecular Biology 30 (2022) 91–98.","apa":"Yelland, J. N., Bravo, J. P. K., Black, J. J., Taylor, D. W., &#38; Johnson, A. W. (2022). A single 2′-O-methylation of ribosomal RNA gates assembly of a functional ribosome. <i>Nature Structural &#38; Molecular Biology</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41594-022-00891-8\">https://doi.org/10.1038/s41594-022-00891-8</a>","ista":"Yelland JN, Bravo JPK, Black JJ, Taylor DW, Johnson AW. 2022. A single 2′-O-methylation of ribosomal RNA gates assembly of a functional ribosome. Nature Structural &#38; Molecular Biology. 30, 91–98.","ama":"Yelland JN, Bravo JPK, Black JJ, Taylor DW, Johnson AW. A single 2′-O-methylation of ribosomal RNA gates assembly of a functional ribosome. <i>Nature Structural &#38; Molecular Biology</i>. 2022;30:91-98. doi:<a href=\"https://doi.org/10.1038/s41594-022-00891-8\">10.1038/s41594-022-00891-8</a>","chicago":"Yelland, James N., Jack Peter Kelly Bravo, Joshua J. Black, David W. Taylor, and Arlen W. Johnson. “A Single 2′-O-Methylation of Ribosomal RNA Gates Assembly of a Functional Ribosome.” <i>Nature Structural &#38; Molecular Biology</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41594-022-00891-8\">https://doi.org/10.1038/s41594-022-00891-8</a>.","mla":"Yelland, James N., et al. “A Single 2′-O-Methylation of Ribosomal RNA Gates Assembly of a Functional Ribosome.” <i>Nature Structural &#38; Molecular Biology</i>, vol. 30, Springer Nature, 2022, pp. 91–98, doi:<a href=\"https://doi.org/10.1038/s41594-022-00891-8\">10.1038/s41594-022-00891-8</a>."},"publication":"Nature Structural & Molecular Biology","article_processing_charge":"Yes (in subscription journal)","year":"2022","page":"91-98","oa_version":"Published Version","pmid":1,"_id":"15131","date_updated":"2024-06-04T06:27:09Z","title":"A single 2′-O-methylation of ribosomal RNA gates assembly of a functional ribosome","intvolume":"        30","external_id":{"pmid":["36536102"]},"oa":1,"month":"12","volume":30},{"date_published":"2022-12-01T00:00:00Z","quality_controlled":"1","publisher":"Elsevier","date_created":"2024-03-20T10:41:53Z","scopus_import":"1","type":"journal_article","article_type":"review","doi":"10.1016/j.copbio.2022.102839","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","keyword":["Biomedical Engineering","Bioengineering","Biotechnology"],"day":"01","abstract":[{"text":"Clustered regularly interspaced short palindromic repeats - CRISPR-associated protein (CRISPR-Cas) systems are a critical component of the bacterial adaptive immune response. Since the discovery that they can be reengineered as programmable RNA-guided nucleases, there has been significant interest in using these systems to perform diverse and precise genetic manipulations. Here, we outline recent advances in the mechanistic understanding of CRISPR-Cas9, how these findings have been leveraged in the rational redesign of Cas9 variants with altered activities, and how these novel tools can be exploited for biotechnology and therapeutics. We also discuss the potential of the ubiquitous, yet often-overlooked, multisubunit CRISPR effector complexes for large-scale genomic deletions. Furthermore, we highlight how future structural studies will bolster these technologies.","lang":"eng"}],"status":"public","pmid":1,"_id":"15132","date_updated":"2024-10-14T12:34:11Z","title":"Constructing next-generation CRISPR–Cas tools from structural blueprints","intvolume":"        78","external_id":{"pmid":["36371895"]},"volume":78,"month":"12","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0958-1669"]},"author":[{"full_name":"Bravo, Jack Peter Kelly","last_name":"Bravo","orcid":"0000-0003-0456-0753","first_name":"Jack Peter Kelly","id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e"},{"last_name":"Hibshman","full_name":"Hibshman, Grace N","first_name":"Grace N"},{"first_name":"David W","full_name":"Taylor, David W","last_name":"Taylor"}],"publication_status":"published","article_number":"102839","citation":{"ista":"Bravo JPK, Hibshman GN, Taylor DW. 2022. Constructing next-generation CRISPR–Cas tools from structural blueprints. Current Opinion in Biotechnology. 78, 102839.","apa":"Bravo, J. P. K., Hibshman, G. N., &#38; Taylor, D. W. (2022). Constructing next-generation CRISPR–Cas tools from structural blueprints. <i>Current Opinion in Biotechnology</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.copbio.2022.102839\">https://doi.org/10.1016/j.copbio.2022.102839</a>","short":"J.P.K. Bravo, G.N. Hibshman, D.W. Taylor, Current Opinion in Biotechnology 78 (2022).","ieee":"J. P. K. Bravo, G. N. Hibshman, and D. W. Taylor, “Constructing next-generation CRISPR–Cas tools from structural blueprints,” <i>Current Opinion in Biotechnology</i>, vol. 78. Elsevier, 2022.","mla":"Bravo, Jack Peter Kelly, et al. “Constructing Next-Generation CRISPR–Cas Tools from Structural Blueprints.” <i>Current Opinion in Biotechnology</i>, vol. 78, 102839, Elsevier, 2022, doi:<a href=\"https://doi.org/10.1016/j.copbio.2022.102839\">10.1016/j.copbio.2022.102839</a>.","chicago":"Bravo, Jack Peter Kelly, Grace N Hibshman, and David W Taylor. “Constructing Next-Generation CRISPR–Cas Tools from Structural Blueprints.” <i>Current Opinion in Biotechnology</i>. Elsevier, 2022. <a href=\"https://doi.org/10.1016/j.copbio.2022.102839\">https://doi.org/10.1016/j.copbio.2022.102839</a>.","ama":"Bravo JPK, Hibshman GN, Taylor DW. Constructing next-generation CRISPR–Cas tools from structural blueprints. <i>Current Opinion in Biotechnology</i>. 2022;78. doi:<a href=\"https://doi.org/10.1016/j.copbio.2022.102839\">10.1016/j.copbio.2022.102839</a>"},"publication":"Current Opinion in Biotechnology","article_processing_charge":"No","year":"2022","oa_version":"None"},{"type":"journal_article","publisher":"Springer Nature","date_created":"2024-03-20T10:41:59Z","scopus_import":"1","quality_controlled":"1","date_published":"2022-05-27T00:00:00Z","doi":"10.1038/s41467-022-30673-1","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","day":"27","keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"status":"public","abstract":[{"text":"In the evolutionary arms race against phage, bacteria have assembled a diverse arsenal of antiviral immune strategies. While the recently discovered DISARM (Defense Island System Associated with Restriction-Modification) systems can provide protection against a wide range of phage, the molecular mechanisms that underpin broad antiviral targeting but avoiding autoimmunity remain enigmatic. Here, we report cryo-EM structures of the core DISARM complex, DrmAB, both alone and in complex with an unmethylated phage DNA mimetic. These structures reveal that DrmAB core complex is autoinhibited by a trigger loop (TL) within DrmA and binding to DNA substrates containing a 5′ overhang dislodges the TL, initiating a long-range structural rearrangement for DrmAB activation. Together with structure-guided in vivo studies, our work provides insights into the mechanism of phage DNA recognition and specific activation of this widespread antiviral defense system.","lang":"eng"}],"main_file_link":[{"url":"https://doi.org/10.1038/s41467-022-30673-1","open_access":"1"}],"date_updated":"2024-06-04T06:16:38Z","_id":"15133","pmid":1,"oa":1,"month":"05","volume":13,"external_id":{"pmid":["35624106"]},"title":"Structural basis for broad anti-phage immunity by DISARM","intvolume":"        13","publication":"Nature Communications","publication_status":"published","article_number":"2987","citation":{"short":"J.P.K. Bravo, C. Aparicio-Maldonado, F.L. Nobrega, S.J.J. Brouns, D.W. Taylor, Nature Communications 13 (2022).","ieee":"J. P. K. Bravo, C. Aparicio-Maldonado, F. L. Nobrega, S. J. J. Brouns, and D. W. Taylor, “Structural basis for broad anti-phage immunity by DISARM,” <i>Nature Communications</i>, vol. 13. Springer Nature, 2022.","apa":"Bravo, J. P. K., Aparicio-Maldonado, C., Nobrega, F. L., Brouns, S. J. J., &#38; Taylor, D. W. (2022). Structural basis for broad anti-phage immunity by DISARM. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-022-30673-1\">https://doi.org/10.1038/s41467-022-30673-1</a>","ista":"Bravo JPK, Aparicio-Maldonado C, Nobrega FL, Brouns SJJ, Taylor DW. 2022. Structural basis for broad anti-phage immunity by DISARM. Nature Communications. 13, 2987.","chicago":"Bravo, Jack Peter Kelly, Cristian Aparicio-Maldonado, Franklin L. Nobrega, Stan J. J. Brouns, and David W. Taylor. “Structural Basis for Broad Anti-Phage Immunity by DISARM.” <i>Nature Communications</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41467-022-30673-1\">https://doi.org/10.1038/s41467-022-30673-1</a>.","ama":"Bravo JPK, Aparicio-Maldonado C, Nobrega FL, Brouns SJJ, Taylor DW. Structural basis for broad anti-phage immunity by DISARM. <i>Nature Communications</i>. 2022;13. doi:<a href=\"https://doi.org/10.1038/s41467-022-30673-1\">10.1038/s41467-022-30673-1</a>","mla":"Bravo, Jack Peter Kelly, et al. “Structural Basis for Broad Anti-Phage Immunity by DISARM.” <i>Nature Communications</i>, vol. 13, 2987, Springer Nature, 2022, doi:<a href=\"https://doi.org/10.1038/s41467-022-30673-1\">10.1038/s41467-022-30673-1</a>."},"author":[{"orcid":"0000-0003-0456-0753","first_name":"Jack Peter Kelly","id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e","full_name":"Bravo, Jack Peter Kelly","last_name":"Bravo"},{"first_name":"Cristian","last_name":"Aparicio-Maldonado","full_name":"Aparicio-Maldonado, Cristian"},{"full_name":"Nobrega, Franklin L.","last_name":"Nobrega","first_name":"Franklin L."},{"full_name":"Brouns, Stan J. J.","last_name":"Brouns","first_name":"Stan J. J."},{"first_name":"David W.","full_name":"Taylor, David W.","last_name":"Taylor"}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["2041-1723"]},"oa_version":"Published Version","year":"2022","article_processing_charge":"Yes"},{"doi":"10.1038/s41467-022-30402-8","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","type":"journal_article","publisher":"Springer Nature","date_created":"2024-03-20T10:42:05Z","scopus_import":"1","date_published":"2022-05-20T00:00:00Z","quality_controlled":"1","status":"public","abstract":[{"text":"CRISPR-Cas systems are adaptive immune systems that protect prokaryotes from foreign nucleic acids, such as bacteriophages. Two of the most prevalent CRISPR-Cas systems include type I and type III. Interestingly, the type I-D interference proteins contain characteristic features of both type I and type III systems. Here, we present the structures of type I-D Cascade bound to both a double-stranded (ds)DNA and a single-stranded (ss)RNA target at 2.9 and 3.1 Å, respectively. We show that type I-D Cascade is capable of specifically binding ssRNA and reveal how PAM recognition of dsDNA targets initiates long-range structural rearrangements that likely primes Cas10d for Cas3′ binding and subsequent non-target strand DNA cleavage. These structures allow us to model how binding of the anti-CRISPR protein AcrID1 likely blocks target dsDNA binding via competitive inhibition of the DNA substrate engagement with the Cas10d active site. This work elucidates the unique mechanisms used by type I-D Cascade for discrimination of single-stranded and double stranded targets. Thus, our data supports a model for the hybrid nature of this complex with features of type III and type I systems.","lang":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1038/s41467-022-30402-8"}],"day":"20","keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"oa":1,"volume":13,"month":"05","external_id":{"pmid":["35595728"]},"title":"Structural rearrangements allow nucleic acid discrimination by type I-D Cascade","intvolume":"        13","date_updated":"2024-06-04T06:14:28Z","_id":"15134","pmid":1,"oa_version":"Published Version","year":"2022","article_processing_charge":"Yes","publication":"Nature Communications","article_number":"2829","publication_status":"published","citation":{"apa":"Schwartz, E. A., McBride, T. M., Bravo, J. P. K., Wrapp, D., Fineran, P. C., Fagerlund, R. D., &#38; Taylor, D. W. (2022). Structural rearrangements allow nucleic acid discrimination by type I-D Cascade. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-022-30402-8\">https://doi.org/10.1038/s41467-022-30402-8</a>","ista":"Schwartz EA, McBride TM, Bravo JPK, Wrapp D, Fineran PC, Fagerlund RD, Taylor DW. 2022. Structural rearrangements allow nucleic acid discrimination by type I-D Cascade. Nature Communications. 13, 2829.","ieee":"E. A. Schwartz <i>et al.</i>, “Structural rearrangements allow nucleic acid discrimination by type I-D Cascade,” <i>Nature Communications</i>, vol. 13. Springer Nature, 2022.","short":"E.A. Schwartz, T.M. McBride, J.P.K. Bravo, D. Wrapp, P.C. Fineran, R.D. Fagerlund, D.W. Taylor, Nature Communications 13 (2022).","mla":"Schwartz, Evan A., et al. “Structural Rearrangements Allow Nucleic Acid Discrimination by Type I-D Cascade.” <i>Nature Communications</i>, vol. 13, 2829, Springer Nature, 2022, doi:<a href=\"https://doi.org/10.1038/s41467-022-30402-8\">10.1038/s41467-022-30402-8</a>.","ama":"Schwartz EA, McBride TM, Bravo JPK, et al. Structural rearrangements allow nucleic acid discrimination by type I-D Cascade. <i>Nature Communications</i>. 2022;13. doi:<a href=\"https://doi.org/10.1038/s41467-022-30402-8\">10.1038/s41467-022-30402-8</a>","chicago":"Schwartz, Evan A., Tess M. McBride, Jack Peter Kelly Bravo, Daniel Wrapp, Peter C. Fineran, Robert D. Fagerlund, and David W. Taylor. “Structural Rearrangements Allow Nucleic Acid Discrimination by Type I-D Cascade.” <i>Nature Communications</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41467-022-30402-8\">https://doi.org/10.1038/s41467-022-30402-8</a>."},"author":[{"last_name":"Schwartz","full_name":"Schwartz, Evan A.","first_name":"Evan A."},{"last_name":"McBride","full_name":"McBride, Tess M.","first_name":"Tess M."},{"id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e","first_name":"Jack Peter Kelly","orcid":"0000-0003-0456-0753","last_name":"Bravo","full_name":"Bravo, Jack Peter Kelly"},{"first_name":"Daniel","last_name":"Wrapp","full_name":"Wrapp, Daniel"},{"first_name":"Peter C.","full_name":"Fineran, Peter C.","last_name":"Fineran"},{"full_name":"Fagerlund, Robert D.","last_name":"Fagerlund","first_name":"Robert D."},{"last_name":"Taylor","full_name":"Taylor, David W.","first_name":"David W."}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["2041-1723"]}},{"day":"02","status":"public","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1038/s41586-022-04470-1"}],"abstract":[{"lang":"eng","text":"CRISPR–Cas9 as a programmable genome editing tool is hindered by off-target DNA cleavage1,2,3,4, and the underlying mechanisms by which Cas9 recognizes mismatches are poorly understood5,6,7. Although Cas9 variants with greater discrimination against mismatches have been designed8,9,10, these suffer from substantially reduced rates of on-target DNA cleavage5,11. Here we used kinetics-guided cryo-electron microscopy to determine the structure of Cas9 at different stages of mismatch cleavage. We observed a distinct, linear conformation of the guide RNA–DNA duplex formed in the presence of mismatches, which prevents Cas9 activation. Although the canonical kinked guide RNA–DNA duplex conformation facilitates DNA cleavage, we observe that substrates that contain mismatches distal to the protospacer adjacent motif are stabilized by reorganization of a loop in the RuvC domain. Mutagenesis of mismatch-stabilizing residues reduces off-target DNA cleavage but maintains rapid on-target DNA cleavage. By targeting regions that are exclusively involved in mismatch tolerance, we provide a proof of concept for the design of next-generation high-fidelity Cas9 variants."}],"scopus_import":"1","publisher":"Springer Nature","date_created":"2024-03-20T10:42:21Z","quality_controlled":"1","date_published":"2022-03-02T00:00:00Z","issue":"7900","type":"journal_article","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.1038/s41586-022-04470-1","article_type":"original","author":[{"last_name":"Bravo","full_name":"Bravo, Jack Peter Kelly","id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e","orcid":"0000-0003-0456-0753","first_name":"Jack Peter Kelly"},{"first_name":"Mu-Sen","full_name":"Liu, Mu-Sen","last_name":"Liu"},{"full_name":"Hibshman, Grace N.","last_name":"Hibshman","first_name":"Grace N."},{"first_name":"Tyler L.","full_name":"Dangerfield, Tyler L.","last_name":"Dangerfield"},{"full_name":"Jung, Kyungseok","last_name":"Jung","first_name":"Kyungseok"},{"last_name":"McCool","full_name":"McCool, Ryan S.","first_name":"Ryan S."},{"full_name":"Johnson, Kenneth A.","last_name":"Johnson","first_name":"Kenneth A."},{"last_name":"Taylor","full_name":"Taylor, David W.","first_name":"David W."}],"publication_identifier":{"eissn":["1476-4687"],"issn":["0028-0836"]},"language":[{"iso":"eng"}],"publication":"Nature","citation":{"chicago":"Bravo, Jack Peter Kelly, Mu-Sen Liu, Grace N. Hibshman, Tyler L. Dangerfield, Kyungseok Jung, Ryan S. McCool, Kenneth A. Johnson, and David W. Taylor. “Structural Basis for Mismatch Surveillance by CRISPR–Cas9.” <i>Nature</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41586-022-04470-1\">https://doi.org/10.1038/s41586-022-04470-1</a>.","ama":"Bravo JPK, Liu M-S, Hibshman GN, et al. Structural basis for mismatch surveillance by CRISPR–Cas9. <i>Nature</i>. 2022;603(7900):343-347. doi:<a href=\"https://doi.org/10.1038/s41586-022-04470-1\">10.1038/s41586-022-04470-1</a>","mla":"Bravo, Jack Peter Kelly, et al. “Structural Basis for Mismatch Surveillance by CRISPR–Cas9.” <i>Nature</i>, vol. 603, no. 7900, Springer Nature, 2022, pp. 343–47, doi:<a href=\"https://doi.org/10.1038/s41586-022-04470-1\">10.1038/s41586-022-04470-1</a>.","short":"J.P.K. Bravo, M.-S. Liu, G.N. Hibshman, T.L. Dangerfield, K. Jung, R.S. McCool, K.A. Johnson, D.W. Taylor, Nature 603 (2022) 343–347.","ieee":"J. P. K. Bravo <i>et al.</i>, “Structural basis for mismatch surveillance by CRISPR–Cas9,” <i>Nature</i>, vol. 603, no. 7900. Springer Nature, pp. 343–347, 2022.","apa":"Bravo, J. P. K., Liu, M.-S., Hibshman, G. N., Dangerfield, T. L., Jung, K., McCool, R. S., … Taylor, D. W. (2022). Structural basis for mismatch surveillance by CRISPR–Cas9. <i>Nature</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41586-022-04470-1\">https://doi.org/10.1038/s41586-022-04470-1</a>","ista":"Bravo JPK, Liu M-S, Hibshman GN, Dangerfield TL, Jung K, McCool RS, Johnson KA, Taylor DW. 2022. Structural basis for mismatch surveillance by CRISPR–Cas9. Nature. 603(7900), 343–347."},"publication_status":"published","year":"2022","article_processing_charge":"Yes (in subscription journal)","oa_version":"Published Version","page":"343-347","pmid":1,"date_updated":"2024-06-04T06:36:59Z","related_material":{"link":[{"relation":"erratum","url":"https://doi.org/10.1038/s41586-022-04655-8"}]},"_id":"15136","intvolume":"       603","title":"Structural basis for mismatch surveillance by CRISPR–Cas9","volume":603,"month":"03","oa":1,"external_id":{"pmid":["35236982"]}},{"oa_version":"None","status":"public","page":"12","year":"2022","article_processing_charge":"No","day":"01","keyword":["Management of Technology and Innovation","Biomedical Engineering","Bioengineering","Biotechnology"],"publication":"Genetic Engineering & Biotechnology News","citation":{"ieee":"J. P. K. Bravo, “SuperFi-Cas9 exceeds fidelity, matches speed of original Cas9,” <i>Genetic Engineering &#38; Biotechnology News</i>, vol. 42, no. 4. Mary Ann Liebert, p. 12, 2022.","short":"J.P.K. Bravo, Genetic Engineering &#38; Biotechnology News 42 (2022) 12.","apa":"Bravo, J. P. K. (2022). SuperFi-Cas9 exceeds fidelity, matches speed of original Cas9. <i>Genetic Engineering &#38; Biotechnology News</i>. Mary Ann Liebert. <a href=\"https://doi.org/10.1089/gen.42.04.03\">https://doi.org/10.1089/gen.42.04.03</a>","ista":"Bravo JPK. 2022. SuperFi-Cas9 exceeds fidelity, matches speed of original Cas9. Genetic Engineering &#38; Biotechnology News. 42(4), 12.","chicago":"Bravo, Jack Peter Kelly. “SuperFi-Cas9 Exceeds Fidelity, Matches Speed of Original Cas9.” <i>Genetic Engineering &#38; Biotechnology News</i>. Mary Ann Liebert, 2022. <a href=\"https://doi.org/10.1089/gen.42.04.03\">https://doi.org/10.1089/gen.42.04.03</a>.","ama":"Bravo JPK. SuperFi-Cas9 exceeds fidelity, matches speed of original Cas9. <i>Genetic Engineering &#38; Biotechnology News</i>. 2022;42(4):12. doi:<a href=\"https://doi.org/10.1089/gen.42.04.03\">10.1089/gen.42.04.03</a>","mla":"Bravo, Jack Peter Kelly. “SuperFi-Cas9 Exceeds Fidelity, Matches Speed of Original Cas9.” <i>Genetic Engineering &#38; Biotechnology News</i>, vol. 42, no. 4, Mary Ann Liebert, 2022, p. 12, doi:<a href=\"https://doi.org/10.1089/gen.42.04.03\">10.1089/gen.42.04.03</a>."},"publication_status":"published","author":[{"last_name":"Bravo","full_name":"Bravo, Jack Peter Kelly","id":"96aecfa5-8931-11ee-af30-aa6a5d6eee0e","orcid":"0000-0003-0456-0753","first_name":"Jack Peter Kelly"}],"publication_identifier":{"issn":["1935-472X"],"eissn":["1937-8661"]},"language":[{"iso":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","volume":42,"month":"04","extern":"1","doi":"10.1089/gen.42.04.03","article_type":"letter_note","intvolume":"        42","title":"SuperFi-Cas9 exceeds fidelity, matches speed of original Cas9","issue":"4","date_updated":"2024-10-14T12:32:14Z","type":"journal_article","_id":"15144","scopus_import":"1","publisher":"Mary Ann Liebert","date_created":"2024-03-20T10:43:19Z","date_published":"2022-04-01T00:00:00Z","quality_controlled":"1"},{"keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"day":"12","main_file_link":[{"open_access":"1","url":"https://doi.org/10.3847/2041-8213/aca486"}],"abstract":[{"text":"The first X-ray pulsar, Cen X-3, was discovered 50 yr ago. Radiation from such objects is expected to be highly polarized due to birefringence of plasma and vacuum associated with propagation of photons in the presence of the strong magnetic field. Here we present results of the observations of Cen X-3 performed with the Imaging X-ray Polarimetry Explorer. The source exhibited significant flux variability and was observed in two states different by a factor of ∼20 in flux. In the low-luminosity state, no significant polarization was found in either pulse phase-averaged (with a 3σ upper limit of 12%) or phase-resolved (the 3σ upper limits are 20%–30%) data. In the bright state, the polarization degree of 5.8% ± 0.3% and polarization angle of 49fdg6 ± 1fdg5 with a significance of about 20σ were measured from the spectropolarimetric analysis of the phase-averaged data. The phase-resolved analysis showed a significant anticorrelation between the flux and the polarization degree, as well as strong variations of the polarization angle. The fit with the rotating vector model indicates a position angle of the pulsar spin axis of about 49° and a magnetic obliquity of 17°. The detected relatively low polarization can be explained if the upper layers of the neutron star surface are overheated by the accreted matter and the conversion of the polarization modes occurs within the transition region between the upper hot layer and a cooler underlying atmosphere. A fraction of polarization signal can also be produced by reflection of radiation from the neutron star surface and the accretion curtain.","lang":"eng"}],"status":"public","quality_controlled":"1","date_published":"2022-12-12T00:00:00Z","publisher":"American Astronomical Society","date_created":"2024-03-26T09:50:38Z","scopus_import":"1","type":"journal_article","issue":"1","article_type":"original","doi":"10.3847/2041-8213/aca486","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","language":[{"iso":"eng"}],"publication_identifier":{"eissn":["2041-8213"],"issn":["2041-8205"]},"author":[{"first_name":"Sergey S.","full_name":"Tsygankov, Sergey S.","last_name":"Tsygankov"},{"full_name":"Doroshenko, Victor","last_name":"Doroshenko","first_name":"Victor"},{"full_name":"Poutanen, Juri","last_name":"Poutanen","first_name":"Juri"},{"full_name":"Heyl, Jeremy","last_name":"Heyl","first_name":"Jeremy"},{"first_name":"Alexander A.","full_name":"Mushtukov, Alexander A.","last_name":"Mushtukov"},{"full_name":"Caiazzo, Ilaria","last_name":"Caiazzo","orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d"},{"full_name":"Di Marco, Alessandro","last_name":"Di Marco","first_name":"Alessandro"},{"full_name":"Forsblom, Sofia V.","last_name":"Forsblom","first_name":"Sofia V."},{"full_name":"González-Caniulef, Denis","last_name":"González-Caniulef","first_name":"Denis"},{"first_name":"Moritz","last_name":"Klawin","full_name":"Klawin, Moritz"},{"last_name":"La Monaca","full_name":"La Monaca, Fabio","first_name":"Fabio"},{"first_name":"Christian","last_name":"Malacaria","full_name":"Malacaria, Christian"},{"first_name":"Herman L.","full_name":"Marshall, Herman L.","last_name":"Marshall"},{"first_name":"Fabio","full_name":"Muleri, Fabio","last_name":"Muleri"},{"first_name":"Mason","full_name":"Ng, Mason","last_name":"Ng"},{"first_name":"Valery F.","last_name":"Suleimanov","full_name":"Suleimanov, Valery F."},{"full_name":"Sunyaev, Rashid A.","last_name":"Sunyaev","first_name":"Rashid A."},{"first_name":"Roberto","last_name":"Turolla","full_name":"Turolla, Roberto"},{"full_name":"Agudo, Iván","last_name":"Agudo","first_name":"Iván"},{"last_name":"Antonelli","full_name":"Antonelli, Lucio A.","first_name":"Lucio A."},{"first_name":"Matteo","last_name":"Bachetti","full_name":"Bachetti, Matteo"},{"full_name":"Baldini, Luca","last_name":"Baldini","first_name":"Luca"},{"first_name":"Wayne H.","last_name":"Baumgartner","full_name":"Baumgartner, Wayne H."},{"full_name":"Bellazzini, Ronaldo","last_name":"Bellazzini","first_name":"Ronaldo"},{"last_name":"Bianchi","full_name":"Bianchi, Stefano","first_name":"Stefano"},{"full_name":"Bongiorno, Stephen D.","last_name":"Bongiorno","first_name":"Stephen D."},{"first_name":"Raffaella","full_name":"Bonino, Raffaella","last_name":"Bonino"},{"last_name":"Brez","full_name":"Brez, Alessandro","first_name":"Alessandro"},{"full_name":"Bucciantini, Niccolò","last_name":"Bucciantini","first_name":"Niccolò"},{"first_name":"Fiamma","full_name":"Capitanio, Fiamma","last_name":"Capitanio"},{"last_name":"Castellano","full_name":"Castellano, Simone","first_name":"Simone"},{"first_name":"Elisabetta","last_name":"Cavazzuti","full_name":"Cavazzuti, Elisabetta"},{"last_name":"Ciprini","full_name":"Ciprini, Stefano","first_name":"Stefano"},{"first_name":"Enrico","last_name":"Costa","full_name":"Costa, Enrico"},{"first_name":"Alessandra De","full_name":"Rosa, Alessandra De","last_name":"Rosa"},{"first_name":"Ettore","full_name":"Del Monte, Ettore","last_name":"Del Monte"},{"first_name":"Laura Di","last_name":"Gesu","full_name":"Gesu, Laura Di"},{"last_name":"Lalla","full_name":"Lalla, Niccolò Di","first_name":"Niccolò Di"},{"first_name":"Immacolata","last_name":"Donnarumma","full_name":"Donnarumma, Immacolata"},{"first_name":"Michal","full_name":"Dovčiak, Michal","last_name":"Dovčiak"},{"first_name":"Steven R.","full_name":"Ehlert, Steven R.","last_name":"Ehlert"},{"full_name":"Enoto, Teruaki","last_name":"Enoto","first_name":"Teruaki"},{"full_name":"Evangelista, Yuri","last_name":"Evangelista","first_name":"Yuri"},{"first_name":"Sergio","full_name":"Fabiani, Sergio","last_name":"Fabiani"},{"first_name":"Riccardo","last_name":"Ferrazzoli","full_name":"Ferrazzoli, Riccardo"},{"first_name":"Javier A.","full_name":"Garcia, Javier A.","last_name":"Garcia"},{"last_name":"Gunji","full_name":"Gunji, Shuichi","first_name":"Shuichi"},{"last_name":"Hayashida","full_name":"Hayashida, Kiyoshi","first_name":"Kiyoshi"},{"full_name":"Iwakiri, Wataru","last_name":"Iwakiri","first_name":"Wataru"},{"last_name":"Jorstad","full_name":"Jorstad, Svetlana G.","first_name":"Svetlana G."},{"last_name":"Karas","full_name":"Karas, Vladimir","first_name":"Vladimir"},{"full_name":"Kitaguchi, Takao","last_name":"Kitaguchi","first_name":"Takao"},{"last_name":"Kolodziejczak","full_name":"Kolodziejczak, Jeffery J.","first_name":"Jeffery J."},{"first_name":"Henric","last_name":"Krawczynski","full_name":"Krawczynski, Henric"},{"first_name":"Luca","last_name":"Latronico","full_name":"Latronico, Luca"},{"last_name":"Liodakis","full_name":"Liodakis, Ioannis","first_name":"Ioannis"},{"first_name":"Simone","full_name":"Maldera, Simone","last_name":"Maldera"},{"last_name":"Manfreda","full_name":"Manfreda, Alberto","first_name":"Alberto"},{"full_name":"Marin, Frédéric","last_name":"Marin","first_name":"Frédéric"},{"full_name":"Marinucci, Andrea","last_name":"Marinucci","first_name":"Andrea"},{"first_name":"Alan P.","last_name":"Marscher","full_name":"Marscher, Alan P."},{"first_name":"Giorgio","full_name":"Matt, Giorgio","last_name":"Matt"},{"last_name":"Mitsuishi","full_name":"Mitsuishi, Ikuyuki","first_name":"Ikuyuki"},{"first_name":"Tsunefumi","full_name":"Mizuno, Tsunefumi","last_name":"Mizuno"},{"full_name":"Ng, Chi-Yung","last_name":"Ng","first_name":"Chi-Yung"},{"first_name":"Stephen L.","last_name":"O’Dell","full_name":"O’Dell, Stephen L."},{"first_name":"Nicola","last_name":"Omodei","full_name":"Omodei, Nicola"},{"last_name":"Oppedisano","full_name":"Oppedisano, Chiara","first_name":"Chiara"},{"last_name":"Papitto","full_name":"Papitto, Alessandro","first_name":"Alessandro"},{"first_name":"George G.","full_name":"Pavlov, George G.","last_name":"Pavlov"},{"full_name":"Peirson, Abel L.","last_name":"Peirson","first_name":"Abel L."},{"first_name":"Matteo","last_name":"Perri","full_name":"Perri, Matteo"},{"first_name":"Melissa","last_name":"Pesce-Rollins","full_name":"Pesce-Rollins, Melissa"},{"full_name":"Petrucci, Pierre-Olivier","last_name":"Petrucci","first_name":"Pierre-Olivier"},{"first_name":"Maura","full_name":"Pilia, Maura","last_name":"Pilia"},{"last_name":"Possenti","full_name":"Possenti, Andrea","first_name":"Andrea"},{"last_name":"Puccetti","full_name":"Puccetti, Simonetta","first_name":"Simonetta"},{"first_name":"Brian D.","full_name":"Ramsey, Brian D.","last_name":"Ramsey"},{"first_name":"John","last_name":"Rankin","full_name":"Rankin, John"},{"first_name":"Ajay","last_name":"Ratheesh","full_name":"Ratheesh, Ajay"},{"full_name":"Romani, Roger W.","last_name":"Romani","first_name":"Roger W."},{"first_name":"Carmelo","last_name":"Sgrò","full_name":"Sgrò, Carmelo"},{"full_name":"Slane, Patrick","last_name":"Slane","first_name":"Patrick"},{"last_name":"Soffitta","full_name":"Soffitta, Paolo","first_name":"Paolo"},{"last_name":"Spandre","full_name":"Spandre, Gloria","first_name":"Gloria"},{"first_name":"Toru","full_name":"Tamagawa, Toru","last_name":"Tamagawa"},{"first_name":"Fabrizio","full_name":"Tavecchio, Fabrizio","last_name":"Tavecchio"},{"last_name":"Taverna","full_name":"Taverna, Roberto","first_name":"Roberto"},{"first_name":"Yuzuru","last_name":"Tawara","full_name":"Tawara, Yuzuru"},{"first_name":"Allyn F.","full_name":"Tennant, Allyn F.","last_name":"Tennant"},{"last_name":"Thomas","full_name":"Thomas, Nicholas E.","first_name":"Nicholas E."},{"first_name":"Francesco","last_name":"Tombesi","full_name":"Tombesi, Francesco"},{"full_name":"Trois, Alessio","last_name":"Trois","first_name":"Alessio"},{"last_name":"Vink","full_name":"Vink, Jacco","first_name":"Jacco"},{"first_name":"Martin C.","last_name":"Weisskopf","full_name":"Weisskopf, Martin C."},{"full_name":"Wu, Kinwah","last_name":"Wu","first_name":"Kinwah"},{"last_name":"Xie","full_name":"Xie, Fei","first_name":"Fei"},{"last_name":"Zane","full_name":"Zane, Silvia","first_name":"Silvia"}],"article_number":"L14","publication_status":"published","citation":{"short":"S.S. Tsygankov, V. Doroshenko, J. Poutanen, J. Heyl, A.A. Mushtukov, I. Caiazzo, A. Di Marco, S.V. Forsblom, D. González-Caniulef, M. Klawin, F. La Monaca, C. Malacaria, H.L. Marshall, F. Muleri, M. Ng, V.F. Suleimanov, R.A. Sunyaev, R. Turolla, I. Agudo, L.A. Antonelli, M. Bachetti, L. Baldini, W.H. Baumgartner, R. Bellazzini, S. Bianchi, S.D. Bongiorno, R. Bonino, A. Brez, N. Bucciantini, F. Capitanio, S. Castellano, E. Cavazzuti, S. Ciprini, E. Costa, A.D. Rosa, E. Del Monte, L.D. Gesu, N.D. Lalla, I. Donnarumma, M. Dovčiak, S.R. Ehlert, T. Enoto, Y. Evangelista, S. Fabiani, R. Ferrazzoli, J.A. Garcia, S. Gunji, K. Hayashida, W. Iwakiri, S.G. Jorstad, V. Karas, T. Kitaguchi, J.J. Kolodziejczak, H. Krawczynski, L. Latronico, I. Liodakis, S. Maldera, A. Manfreda, F. Marin, A. Marinucci, A.P. Marscher, G. Matt, I. Mitsuishi, T. Mizuno, C.-Y. Ng, S.L. O’Dell, N. Omodei, C. Oppedisano, A. Papitto, G.G. Pavlov, A.L. Peirson, M. Perri, M. Pesce-Rollins, P.-O. Petrucci, M. Pilia, A. Possenti, S. Puccetti, B.D. Ramsey, J. Rankin, A. Ratheesh, R.W. Romani, C. Sgrò, P. Slane, P. Soffitta, G. Spandre, T. Tamagawa, F. Tavecchio, R. Taverna, Y. Tawara, A.F. Tennant, N.E. Thomas, F. Tombesi, A. Trois, J. Vink, M.C. Weisskopf, K. Wu, F. Xie, S. Zane, The Astrophysical Journal Letters 941 (2022).","ieee":"S. S. Tsygankov <i>et al.</i>, “The x-ray polarimetry view of the accreting pulsar Cen X-3,” <i>The Astrophysical Journal Letters</i>, vol. 941, no. 1. American Astronomical Society, 2022.","apa":"Tsygankov, S. S., Doroshenko, V., Poutanen, J., Heyl, J., Mushtukov, A. A., Caiazzo, I., … Zane, S. (2022). The x-ray polarimetry view of the accreting pulsar Cen X-3. <i>The Astrophysical Journal Letters</i>. American Astronomical Society. <a href=\"https://doi.org/10.3847/2041-8213/aca486\">https://doi.org/10.3847/2041-8213/aca486</a>","ista":"Tsygankov SS, Doroshenko V, Poutanen J, Heyl J, Mushtukov AA, Caiazzo I, Di Marco A, Forsblom SV, González-Caniulef D, Klawin M, La Monaca F, Malacaria C, Marshall HL, Muleri F, Ng M, Suleimanov VF, Sunyaev RA, Turolla R, Agudo I, Antonelli LA, Bachetti M, Baldini L, Baumgartner WH, Bellazzini R, Bianchi S, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Capitanio F, Castellano S, Cavazzuti E, Ciprini S, Costa E, Rosa AD, Del Monte E, Gesu LD, Lalla ND, Donnarumma I, Dovčiak M, Ehlert SR, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Garcia JA, Gunji S, Hayashida K, Iwakiri W, Jorstad SG, Karas V, Kitaguchi T, Kolodziejczak JJ, Krawczynski H, Latronico L, Liodakis I, Maldera S, Manfreda A, Marin F, Marinucci A, Marscher AP, Matt G, Mitsuishi I, Mizuno T, Ng C-Y, O’Dell SL, Omodei N, Oppedisano C, Papitto A, Pavlov GG, Peirson AL, Perri M, Pesce-Rollins M, Petrucci P-O, Pilia M, Possenti A, Puccetti S, Ramsey BD, Rankin J, Ratheesh A, Romani RW, Sgrò C, Slane P, Soffitta P, Spandre G, Tamagawa T, Tavecchio F, Taverna R, Tawara Y, Tennant AF, Thomas NE, Tombesi F, Trois A, Vink J, Weisskopf MC, Wu K, Xie F, Zane S. 2022. The x-ray polarimetry view of the accreting pulsar Cen X-3. The Astrophysical Journal Letters. 941(1), L14.","chicago":"Tsygankov, Sergey S., Victor Doroshenko, Juri Poutanen, Jeremy Heyl, Alexander A. Mushtukov, Ilaria Caiazzo, Alessandro Di Marco, et al. “The X-Ray Polarimetry View of the Accreting Pulsar Cen X-3.” <i>The Astrophysical Journal Letters</i>. American Astronomical Society, 2022. <a href=\"https://doi.org/10.3847/2041-8213/aca486\">https://doi.org/10.3847/2041-8213/aca486</a>.","ama":"Tsygankov SS, Doroshenko V, Poutanen J, et al. The x-ray polarimetry view of the accreting pulsar Cen X-3. <i>The Astrophysical Journal Letters</i>. 2022;941(1). doi:<a href=\"https://doi.org/10.3847/2041-8213/aca486\">10.3847/2041-8213/aca486</a>","mla":"Tsygankov, Sergey S., et al. “The X-Ray Polarimetry View of the Accreting Pulsar Cen X-3.” <i>The Astrophysical Journal Letters</i>, vol. 941, no. 1, L14, American Astronomical Society, 2022, doi:<a href=\"https://doi.org/10.3847/2041-8213/aca486\">10.3847/2041-8213/aca486</a>."},"publication":"The Astrophysical Journal Letters","article_processing_charge":"No","year":"2022","oa_version":"Published Version","arxiv":1,"_id":"15203","date_updated":"2024-04-02T07:16:18Z","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"title":"The x-ray polarimetry view of the accreting pulsar Cen X-3","intvolume":"       941","external_id":{"arxiv":["2209.02447"]},"oa":1,"volume":941,"month":"12"},{"main_file_link":[{"url":"https://arxiv.org/abs/2206.07138","open_access":"1"}],"abstract":[{"lang":"eng","text":"Using observations of X-ray pulsar Hercules X-1 by the Imaging X-ray Polarimetry Explorer we report a highly significant (>17σ) detection of the polarization signal from an accreting neutron star. The observed degree of linear polarization of ~10% is far below theoretical expectations for this object, and stays low throughout the spin cycle of the pulsar. Both the degree and angle of polarization exhibit variability with the pulse phase, allowing us to measure the pulsar spin position angle 57(2) deg and the magnetic obliquity 12(4) deg, which is an essential step towards detailed modelling of the intrinsic emission of X-ray pulsars. Combining our results with the optical polarimetric data, we find that the spin axis of the neutron star and the angular momentum of the binary orbit are misaligned by at least ~20 deg, which is a strong argument in support of the models explaining the stability of the observed superorbital variability with the precession of the neutron star."}],"status":"public","day":"22","keyword":["Astronomy and Astrophysics"],"article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.1038/s41550-022-01799-5","quality_controlled":"1","date_published":"2022-10-22T00:00:00Z","scopus_import":"1","date_created":"2024-03-26T09:51:04Z","publisher":"Springer Nature","issue":"12","type":"journal_article","article_processing_charge":"No","year":"2022","page":"1433-1443","oa_version":"Preprint","arxiv":1,"publication_identifier":{"issn":["2397-3366"]},"language":[{"iso":"eng"}],"author":[{"first_name":"Victor","last_name":"Doroshenko","full_name":"Doroshenko, Victor"},{"last_name":"Poutanen","full_name":"Poutanen, Juri","first_name":"Juri"},{"full_name":"Tsygankov, Sergey S.","last_name":"Tsygankov","first_name":"Sergey S."},{"first_name":"Valery F.","full_name":"Suleimanov, Valery F.","last_name":"Suleimanov"},{"full_name":"Bachetti, Matteo","last_name":"Bachetti","first_name":"Matteo"},{"orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","full_name":"Caiazzo, Ilaria","last_name":"Caiazzo"},{"first_name":"Enrico","last_name":"Costa","full_name":"Costa, Enrico"},{"first_name":"Alessandro","last_name":"Di Marco","full_name":"Di Marco, Alessandro"},{"first_name":"Jeremy","full_name":"Heyl, Jeremy","last_name":"Heyl"},{"first_name":"Fabio","last_name":"La Monaca","full_name":"La Monaca, Fabio"},{"first_name":"Fabio","last_name":"Muleri","full_name":"Muleri, Fabio"},{"first_name":"Alexander A.","last_name":"Mushtukov","full_name":"Mushtukov, Alexander A."},{"last_name":"Pavlov","full_name":"Pavlov, George G.","first_name":"George G."},{"last_name":"Ramsey","full_name":"Ramsey, Brian D.","first_name":"Brian D."},{"first_name":"John","last_name":"Rankin","full_name":"Rankin, John"},{"first_name":"Andrea","full_name":"Santangelo, Andrea","last_name":"Santangelo"},{"full_name":"Soffitta, Paolo","last_name":"Soffitta","first_name":"Paolo"},{"first_name":"Rüdiger","last_name":"Staubert","full_name":"Staubert, Rüdiger"},{"first_name":"Martin C.","last_name":"Weisskopf","full_name":"Weisskopf, Martin C."},{"last_name":"Zane","full_name":"Zane, Silvia","first_name":"Silvia"},{"first_name":"Iván","last_name":"Agudo","full_name":"Agudo, Iván"},{"full_name":"Antonelli, Lucio A.","last_name":"Antonelli","first_name":"Lucio A."},{"full_name":"Baldini, Luca","last_name":"Baldini","first_name":"Luca"},{"first_name":"Wayne H.","full_name":"Baumgartner, Wayne H.","last_name":"Baumgartner"},{"first_name":"Ronaldo","last_name":"Bellazzini","full_name":"Bellazzini, Ronaldo"},{"last_name":"Bianchi","full_name":"Bianchi, Stefano","first_name":"Stefano"},{"first_name":"Stephen D.","full_name":"Bongiorno, Stephen D.","last_name":"Bongiorno"},{"first_name":"Raffaella","full_name":"Bonino, Raffaella","last_name":"Bonino"},{"first_name":"Alessandro","full_name":"Brez, Alessandro","last_name":"Brez"},{"first_name":"Niccolò","last_name":"Bucciantini","full_name":"Bucciantini, Niccolò"},{"full_name":"Capitanio, Fiamma","last_name":"Capitanio","first_name":"Fiamma"},{"last_name":"Castellano","full_name":"Castellano, Simone","first_name":"Simone"},{"first_name":"Elisabetta","full_name":"Cavazzuti, Elisabetta","last_name":"Cavazzuti"},{"first_name":"Stefano","full_name":"Ciprini, Stefano","last_name":"Ciprini"},{"first_name":"Alessandra","last_name":"De Rosa","full_name":"De Rosa, Alessandra"},{"first_name":"Ettore","last_name":"Del Monte","full_name":"Del Monte, Ettore"},{"first_name":"Laura","last_name":"Di Gesu","full_name":"Di Gesu, Laura"},{"first_name":"Niccolò","full_name":"Di Lalla, Niccolò","last_name":"Di Lalla"},{"last_name":"Donnarumma","full_name":"Donnarumma, Immacolata","first_name":"Immacolata"},{"full_name":"Dovčiak, Michal","last_name":"Dovčiak","first_name":"Michal"},{"first_name":"Steven R.","full_name":"Ehlert, Steven R.","last_name":"Ehlert"},{"first_name":"Teruaki","full_name":"Enoto, Teruaki","last_name":"Enoto"},{"first_name":"Yuri","last_name":"Evangelista","full_name":"Evangelista, Yuri"},{"first_name":"Sergio","last_name":"Fabiani","full_name":"Fabiani, Sergio"},{"first_name":"Riccardo","full_name":"Ferrazzoli, Riccardo","last_name":"Ferrazzoli"},{"first_name":"Javier A.","last_name":"Garcia","full_name":"Garcia, Javier A."},{"last_name":"Gunji","full_name":"Gunji, Shuichi","first_name":"Shuichi"},{"first_name":"Kiyoshi","full_name":"Hayashida, Kiyoshi","last_name":"Hayashida"},{"first_name":"Wataru","full_name":"Iwakiri, Wataru","last_name":"Iwakiri"},{"first_name":"Svetlana G.","full_name":"Jorstad, Svetlana G.","last_name":"Jorstad"},{"full_name":"Karas, Vladimir","last_name":"Karas","first_name":"Vladimir"},{"last_name":"Kitaguchi","full_name":"Kitaguchi, Takao","first_name":"Takao"},{"first_name":"Jeffery J.","full_name":"Kolodziejczak, Jeffery J.","last_name":"Kolodziejczak"},{"full_name":"Krawczynski, Henric","last_name":"Krawczynski","first_name":"Henric"},{"last_name":"Latronico","full_name":"Latronico, Luca","first_name":"Luca"},{"first_name":"Ioannis","full_name":"Liodakis, Ioannis","last_name":"Liodakis"},{"full_name":"Maldera, Simone","last_name":"Maldera","first_name":"Simone"},{"full_name":"Manfreda, Alberto","last_name":"Manfreda","first_name":"Alberto"},{"last_name":"Marin","full_name":"Marin, Frédéric","first_name":"Frédéric"},{"full_name":"Marinucci, Andrea","last_name":"Marinucci","first_name":"Andrea"},{"full_name":"Marscher, Alan P.","last_name":"Marscher","first_name":"Alan P."},{"first_name":"Herman L.","last_name":"Marshall","full_name":"Marshall, Herman L."},{"last_name":"Matt","full_name":"Matt, Giorgio","first_name":"Giorgio"},{"full_name":"Mitsuishi, Ikuyuki","last_name":"Mitsuishi","first_name":"Ikuyuki"},{"last_name":"Mizuno","full_name":"Mizuno, Tsunefumi","first_name":"Tsunefumi"},{"last_name":"Ng","full_name":"Ng, Chi-Yung","first_name":"Chi-Yung"},{"full_name":"O’Dell, Stephen L.","last_name":"O’Dell","first_name":"Stephen L."},{"first_name":"Nicola","full_name":"Omodei, Nicola","last_name":"Omodei"},{"first_name":"Chiara","last_name":"Oppedisano","full_name":"Oppedisano, Chiara"},{"first_name":"Alessandro","full_name":"Papitto, Alessandro","last_name":"Papitto"},{"first_name":"Abel L.","last_name":"Peirson","full_name":"Peirson, Abel L."},{"first_name":"Matteo","last_name":"Perri","full_name":"Perri, Matteo"},{"first_name":"Melissa","full_name":"Pesce-Rollins, Melissa","last_name":"Pesce-Rollins"},{"last_name":"Pilia","full_name":"Pilia, Maura","first_name":"Maura"},{"first_name":"Andrea","full_name":"Possenti, Andrea","last_name":"Possenti"},{"last_name":"Puccetti","full_name":"Puccetti, Simonetta","first_name":"Simonetta"},{"full_name":"Ratheesh, Ajay","last_name":"Ratheesh","first_name":"Ajay"},{"first_name":"Roger W.","last_name":"Romani","full_name":"Romani, Roger W."},{"full_name":"Sgrò, Carmelo","last_name":"Sgrò","first_name":"Carmelo"},{"first_name":"Patrick","full_name":"Slane, Patrick","last_name":"Slane"},{"last_name":"Spandre","full_name":"Spandre, Gloria","first_name":"Gloria"},{"full_name":"Sunyaev, Rashid A.","last_name":"Sunyaev","first_name":"Rashid A."},{"first_name":"Toru","last_name":"Tamagawa","full_name":"Tamagawa, Toru"},{"last_name":"Tavecchio","full_name":"Tavecchio, Fabrizio","first_name":"Fabrizio"},{"last_name":"Taverna","full_name":"Taverna, Roberto","first_name":"Roberto"},{"full_name":"Tawara, Yuzuru","last_name":"Tawara","first_name":"Yuzuru"},{"last_name":"Tennant","full_name":"Tennant, Allyn F.","first_name":"Allyn F."},{"first_name":"Nicolas E.","last_name":"Thomas","full_name":"Thomas, Nicolas E."},{"first_name":"Francesco","last_name":"Tombesi","full_name":"Tombesi, Francesco"},{"first_name":"Alessio","full_name":"Trois, Alessio","last_name":"Trois"},{"first_name":"Roberto","last_name":"Turolla","full_name":"Turolla, Roberto"},{"first_name":"Jacco","last_name":"Vink","full_name":"Vink, Jacco"},{"first_name":"Kinwah","last_name":"Wu","full_name":"Wu, Kinwah"},{"first_name":"Fei","full_name":"Xie, Fei","last_name":"Xie"}],"citation":{"chicago":"Doroshenko, Victor, Juri Poutanen, Sergey S. Tsygankov, Valery F. Suleimanov, Matteo Bachetti, Ilaria Caiazzo, Enrico Costa, et al. “Determination of X-Ray Pulsar Geometry with IXPE Polarimetry.” <i>Nature Astronomy</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41550-022-01799-5\">https://doi.org/10.1038/s41550-022-01799-5</a>.","ama":"Doroshenko V, Poutanen J, Tsygankov SS, et al. Determination of X-ray pulsar geometry with IXPE polarimetry. <i>Nature Astronomy</i>. 2022;6(12):1433-1443. doi:<a href=\"https://doi.org/10.1038/s41550-022-01799-5\">10.1038/s41550-022-01799-5</a>","mla":"Doroshenko, Victor, et al. “Determination of X-Ray Pulsar Geometry with IXPE Polarimetry.” <i>Nature Astronomy</i>, vol. 6, no. 12, Springer Nature, 2022, pp. 1433–43, doi:<a href=\"https://doi.org/10.1038/s41550-022-01799-5\">10.1038/s41550-022-01799-5</a>.","ieee":"V. Doroshenko <i>et al.</i>, “Determination of X-ray pulsar geometry with IXPE polarimetry,” <i>Nature Astronomy</i>, vol. 6, no. 12. Springer Nature, pp. 1433–1443, 2022.","short":"V. Doroshenko, J. Poutanen, S.S. Tsygankov, V.F. Suleimanov, M. Bachetti, I. Caiazzo, E. Costa, A. Di Marco, J. Heyl, F. La Monaca, F. Muleri, A.A. Mushtukov, G.G. Pavlov, B.D. Ramsey, J. Rankin, A. Santangelo, P. Soffitta, R. Staubert, M.C. Weisskopf, S. Zane, I. Agudo, L.A. Antonelli, L. Baldini, W.H. Baumgartner, R. Bellazzini, S. Bianchi, S.D. Bongiorno, R. Bonino, A. Brez, N. Bucciantini, F. Capitanio, S. Castellano, E. Cavazzuti, S. Ciprini, A. De Rosa, E. Del Monte, L. Di Gesu, N. Di Lalla, I. Donnarumma, M. Dovčiak, S.R. Ehlert, T. Enoto, Y. Evangelista, S. Fabiani, R. Ferrazzoli, J.A. Garcia, S. Gunji, K. Hayashida, W. Iwakiri, S.G. Jorstad, V. Karas, T. Kitaguchi, J.J. Kolodziejczak, H. Krawczynski, L. Latronico, I. Liodakis, S. Maldera, A. Manfreda, F. Marin, A. Marinucci, A.P. Marscher, H.L. Marshall, G. Matt, I. Mitsuishi, T. Mizuno, C.-Y. Ng, S.L. O’Dell, N. Omodei, C. Oppedisano, A. Papitto, A.L. Peirson, M. Perri, M. Pesce-Rollins, M. Pilia, A. Possenti, S. Puccetti, A. Ratheesh, R.W. Romani, C. Sgrò, P. Slane, G. Spandre, R.A. Sunyaev, T. Tamagawa, F. Tavecchio, R. Taverna, Y. Tawara, A.F. Tennant, N.E. Thomas, F. Tombesi, A. Trois, R. Turolla, J. Vink, K. Wu, F. Xie, Nature Astronomy 6 (2022) 1433–1443.","apa":"Doroshenko, V., Poutanen, J., Tsygankov, S. S., Suleimanov, V. F., Bachetti, M., Caiazzo, I., … Xie, F. (2022). Determination of X-ray pulsar geometry with IXPE polarimetry. <i>Nature Astronomy</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41550-022-01799-5\">https://doi.org/10.1038/s41550-022-01799-5</a>","ista":"Doroshenko V, Poutanen J, Tsygankov SS, Suleimanov VF, Bachetti M, Caiazzo I, Costa E, Di Marco A, Heyl J, La Monaca F, Muleri F, Mushtukov AA, Pavlov GG, Ramsey BD, Rankin J, Santangelo A, Soffitta P, Staubert R, Weisskopf MC, Zane S, Agudo I, Antonelli LA, Baldini L, Baumgartner WH, Bellazzini R, Bianchi S, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Capitanio F, Castellano S, Cavazzuti E, Ciprini S, De Rosa A, Del Monte E, Di Gesu L, Di Lalla N, Donnarumma I, Dovčiak M, Ehlert SR, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Garcia JA, Gunji S, Hayashida K, Iwakiri W, Jorstad SG, Karas V, Kitaguchi T, Kolodziejczak JJ, Krawczynski H, Latronico L, Liodakis I, Maldera S, Manfreda A, Marin F, Marinucci A, Marscher AP, Marshall HL, Matt G, Mitsuishi I, Mizuno T, Ng C-Y, O’Dell SL, Omodei N, Oppedisano C, Papitto A, Peirson AL, Perri M, Pesce-Rollins M, Pilia M, Possenti A, Puccetti S, Ratheesh A, Romani RW, Sgrò C, Slane P, Spandre G, Sunyaev RA, Tamagawa T, Tavecchio F, Taverna R, Tawara Y, Tennant AF, Thomas NE, Tombesi F, Trois A, Turolla R, Vink J, Wu K, Xie F. 2022. Determination of X-ray pulsar geometry with IXPE polarimetry. Nature Astronomy. 6(12), 1433–1443."},"publication_status":"published","publication":"Nature Astronomy","intvolume":"         6","title":"Determination of X-ray pulsar geometry with IXPE polarimetry","external_id":{"arxiv":["2206.07138"]},"volume":6,"month":"10","oa":1,"_id":"15204","date_updated":"2024-04-02T07:16:54Z"},{"publication_identifier":{"issn":["0036-8075"],"eissn":["1095-9203"]},"language":[{"iso":"eng"}],"author":[{"first_name":"Roberto","full_name":"Taverna, Roberto","last_name":"Taverna"},{"first_name":"Roberto","full_name":"Turolla, Roberto","last_name":"Turolla"},{"first_name":"Fabio","full_name":"Muleri, Fabio","last_name":"Muleri"},{"last_name":"Heyl","full_name":"Heyl, Jeremy","first_name":"Jeremy"},{"first_name":"Silvia","full_name":"Zane, Silvia","last_name":"Zane"},{"first_name":"Luca","last_name":"Baldini","full_name":"Baldini, Luca"},{"full_name":"González-Caniulef, Denis","last_name":"González-Caniulef","first_name":"Denis"},{"first_name":"Matteo","last_name":"Bachetti","full_name":"Bachetti, Matteo"},{"full_name":"Rankin, John","last_name":"Rankin","first_name":"John"},{"id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","first_name":"Ilaria","orcid":"0000-0002-4770-5388","last_name":"Caiazzo","full_name":"Caiazzo, Ilaria"},{"first_name":"Niccolò","last_name":"Di Lalla","full_name":"Di Lalla, Niccolò"},{"full_name":"Doroshenko, Victor","last_name":"Doroshenko","first_name":"Victor"},{"first_name":"Manel","full_name":"Errando, Manel","last_name":"Errando"},{"last_name":"Gau","full_name":"Gau, Ephraim","first_name":"Ephraim"},{"full_name":"Kırmızıbayrak, Demet","last_name":"Kırmızıbayrak","first_name":"Demet"},{"first_name":"Henric","last_name":"Krawczynski","full_name":"Krawczynski, Henric"},{"first_name":"Michela","last_name":"Negro","full_name":"Negro, Michela"},{"full_name":"Ng, Mason","last_name":"Ng","first_name":"Mason"},{"last_name":"Omodei","full_name":"Omodei, Nicola","first_name":"Nicola"},{"full_name":"Possenti, Andrea","last_name":"Possenti","first_name":"Andrea"},{"first_name":"Toru","last_name":"Tamagawa","full_name":"Tamagawa, Toru"},{"first_name":"Keisuke","full_name":"Uchiyama, Keisuke","last_name":"Uchiyama"},{"first_name":"Martin C.","full_name":"Weisskopf, Martin C.","last_name":"Weisskopf"},{"first_name":"Ivan","full_name":"Agudo, Ivan","last_name":"Agudo"},{"first_name":"Lucio A.","last_name":"Antonelli","full_name":"Antonelli, Lucio A."},{"last_name":"Baumgartner","full_name":"Baumgartner, Wayne H.","first_name":"Wayne H."},{"full_name":"Bellazzini, Ronaldo","last_name":"Bellazzini","first_name":"Ronaldo"},{"first_name":"Stefano","last_name":"Bianchi","full_name":"Bianchi, Stefano"},{"first_name":"Stephen D.","last_name":"Bongiorno","full_name":"Bongiorno, Stephen D."},{"first_name":"Raffaella","last_name":"Bonino","full_name":"Bonino, Raffaella"},{"first_name":"Alessandro","full_name":"Brez, Alessandro","last_name":"Brez"},{"first_name":"Niccolò","last_name":"Bucciantini","full_name":"Bucciantini, Niccolò"},{"first_name":"Fiamma","last_name":"Capitanio","full_name":"Capitanio, Fiamma"},{"full_name":"Castellano, Simone","last_name":"Castellano","first_name":"Simone"},{"first_name":"Elisabetta","last_name":"Cavazzuti","full_name":"Cavazzuti, Elisabetta"},{"full_name":"Ciprini, Stefano","last_name":"Ciprini","first_name":"Stefano"},{"full_name":"Costa, Enrico","last_name":"Costa","first_name":"Enrico"},{"full_name":"De Rosa, Alessandra","last_name":"De Rosa","first_name":"Alessandra"},{"first_name":"Ettore","full_name":"Del Monte, Ettore","last_name":"Del Monte"},{"full_name":"Di Gesu, Laura","last_name":"Di Gesu","first_name":"Laura"},{"first_name":"Alessandro","last_name":"Di Marco","full_name":"Di Marco, Alessandro"},{"first_name":"Immacolata","last_name":"Donnarumma","full_name":"Donnarumma, Immacolata"},{"last_name":"Dovčiak","full_name":"Dovčiak, Michal","first_name":"Michal"},{"full_name":"Ehlert, Steven R.","last_name":"Ehlert","first_name":"Steven R."},{"last_name":"Enoto","full_name":"Enoto, Teruaki","first_name":"Teruaki"},{"last_name":"Evangelista","full_name":"Evangelista, Yuri","first_name":"Yuri"},{"first_name":"Sergio","last_name":"Fabiani","full_name":"Fabiani, Sergio"},{"first_name":"Riccardo","last_name":"Ferrazzoli","full_name":"Ferrazzoli, Riccardo"},{"first_name":"Javier A.","full_name":"Garcia, Javier A.","last_name":"Garcia"},{"first_name":"Shuichi","last_name":"Gunji","full_name":"Gunji, Shuichi"},{"last_name":"Hayashida","full_name":"Hayashida, Kiyoshi","first_name":"Kiyoshi"},{"full_name":"Iwakiri, Wataru","last_name":"Iwakiri","first_name":"Wataru"},{"first_name":"Svetlana G.","full_name":"Jorstad, Svetlana G.","last_name":"Jorstad"},{"full_name":"Karas, Vladimir","last_name":"Karas","first_name":"Vladimir"},{"last_name":"Kitaguchi","full_name":"Kitaguchi, Takao","first_name":"Takao"},{"first_name":"Jeffery J.","full_name":"Kolodziejczak, Jeffery J.","last_name":"Kolodziejczak"},{"first_name":"Fabio","last_name":"La Monaca","full_name":"La Monaca, Fabio"},{"first_name":"Luca","full_name":"Latronico, Luca","last_name":"Latronico"},{"full_name":"Liodakis, Ioannis","last_name":"Liodakis","first_name":"Ioannis"},{"last_name":"Maldera","full_name":"Maldera, Simone","first_name":"Simone"},{"last_name":"Manfreda","full_name":"Manfreda, Alberto","first_name":"Alberto"},{"last_name":"Marin","full_name":"Marin, Frédéric","first_name":"Frédéric"},{"first_name":"Andrea","full_name":"Marinucci, Andrea","last_name":"Marinucci"},{"first_name":"Alan P.","full_name":"Marscher, Alan P.","last_name":"Marscher"},{"first_name":"Herman L.","last_name":"Marshall","full_name":"Marshall, Herman L."},{"full_name":"Matt, Giorgio","last_name":"Matt","first_name":"Giorgio"},{"first_name":"Ikuyuki","last_name":"Mitsuishi","full_name":"Mitsuishi, Ikuyuki"},{"full_name":"Mizuno, Tsunefumi","last_name":"Mizuno","first_name":"Tsunefumi"},{"first_name":"Stephen C.-Y.","full_name":"Ng, Stephen C.-Y.","last_name":"Ng"},{"last_name":"O’Dell","full_name":"O’Dell, Stephen L.","first_name":"Stephen L."},{"last_name":"Oppedisano","full_name":"Oppedisano, Chiara","first_name":"Chiara"},{"last_name":"Papitto","full_name":"Papitto, Alessandro","first_name":"Alessandro"},{"first_name":"George G.","last_name":"Pavlov","full_name":"Pavlov, George G."},{"last_name":"Peirson","full_name":"Peirson, Abel L.","first_name":"Abel L."},{"full_name":"Perri, Matteo","last_name":"Perri","first_name":"Matteo"},{"full_name":"Pesce-Rollins, Melissa","last_name":"Pesce-Rollins","first_name":"Melissa"},{"last_name":"Pilia","full_name":"Pilia, Maura","first_name":"Maura"},{"first_name":"Juri","full_name":"Poutanen, Juri","last_name":"Poutanen"},{"first_name":"Simonetta","full_name":"Puccetti, Simonetta","last_name":"Puccetti"},{"first_name":"Brian D.","full_name":"Ramsey, Brian D.","last_name":"Ramsey"},{"first_name":"Ajay","last_name":"Ratheesh","full_name":"Ratheesh, Ajay"},{"last_name":"Romani","full_name":"Romani, Roger W.","first_name":"Roger W."},{"first_name":"Carmelo","last_name":"Sgrò","full_name":"Sgrò, Carmelo"},{"first_name":"Patrick","full_name":"Slane, Patrick","last_name":"Slane"},{"last_name":"Soffitta","full_name":"Soffitta, Paolo","first_name":"Paolo"},{"full_name":"Spandre, Gloria","last_name":"Spandre","first_name":"Gloria"},{"first_name":"Fabrizio","last_name":"Tavecchio","full_name":"Tavecchio, Fabrizio"},{"full_name":"Tawara, Yuzuru","last_name":"Tawara","first_name":"Yuzuru"},{"first_name":"Allyn F.","full_name":"Tennant, Allyn F.","last_name":"Tennant"},{"first_name":"Nicholas E.","last_name":"Thomas","full_name":"Thomas, Nicholas E."},{"full_name":"Tombesi, Francesco","last_name":"Tombesi","first_name":"Francesco"},{"first_name":"Alessio","full_name":"Trois, Alessio","last_name":"Trois"},{"first_name":"Sergey S.","full_name":"Tsygankov, Sergey S.","last_name":"Tsygankov"},{"first_name":"Jacco","last_name":"Vink","full_name":"Vink, Jacco"},{"first_name":"Kinwah","full_name":"Wu, Kinwah","last_name":"Wu"},{"first_name":"Fei","full_name":"Xie, Fei","last_name":"Xie"}],"citation":{"short":"R. Taverna, R. Turolla, F. Muleri, J. Heyl, S. Zane, L. Baldini, D. González-Caniulef, M. Bachetti, J. Rankin, I. Caiazzo, N. Di Lalla, V. Doroshenko, M. Errando, E. Gau, D. Kırmızıbayrak, H. Krawczynski, M. Negro, M. Ng, N. Omodei, A. Possenti, T. Tamagawa, K. Uchiyama, M.C. Weisskopf, I. Agudo, L.A. Antonelli, W.H. Baumgartner, R. Bellazzini, S. Bianchi, S.D. Bongiorno, R. Bonino, A. Brez, N. Bucciantini, F. Capitanio, S. Castellano, E. Cavazzuti, S. Ciprini, E. Costa, A. De Rosa, E. Del Monte, L. Di Gesu, A. Di Marco, I. Donnarumma, M. Dovčiak, S.R. Ehlert, T. Enoto, Y. Evangelista, S. Fabiani, R. Ferrazzoli, J.A. Garcia, S. Gunji, K. Hayashida, W. Iwakiri, S.G. Jorstad, V. Karas, T. Kitaguchi, J.J. Kolodziejczak, F. La Monaca, L. Latronico, I. Liodakis, S. Maldera, A. Manfreda, F. Marin, A. Marinucci, A.P. Marscher, H.L. Marshall, G. Matt, I. Mitsuishi, T. Mizuno, S.C.-Y. Ng, S.L. O’Dell, C. Oppedisano, A. Papitto, G.G. Pavlov, A.L. Peirson, M. Perri, M. Pesce-Rollins, M. Pilia, J. Poutanen, S. Puccetti, B.D. Ramsey, A. Ratheesh, R.W. Romani, C. Sgrò, P. Slane, P. Soffitta, G. Spandre, F. Tavecchio, Y. Tawara, A.F. Tennant, N.E. Thomas, F. Tombesi, A. Trois, S.S. Tsygankov, J. Vink, K. Wu, F. Xie, Science 378 (2022) 646–650.","ieee":"R. Taverna <i>et al.</i>, “Polarized x-rays from a magnetar,” <i>Science</i>, vol. 378, no. 6620. American Association for the Advancement of Science, pp. 646–650, 2022.","apa":"Taverna, R., Turolla, R., Muleri, F., Heyl, J., Zane, S., Baldini, L., … Xie, F. (2022). Polarized x-rays from a magnetar. <i>Science</i>. American Association for the Advancement of Science. <a href=\"https://doi.org/10.1126/science.add0080\">https://doi.org/10.1126/science.add0080</a>","ista":"Taverna R, Turolla R, Muleri F, Heyl J, Zane S, Baldini L, González-Caniulef D, Bachetti M, Rankin J, Caiazzo I, Di Lalla N, Doroshenko V, Errando M, Gau E, Kırmızıbayrak D, Krawczynski H, Negro M, Ng M, Omodei N, Possenti A, Tamagawa T, Uchiyama K, Weisskopf MC, Agudo I, Antonelli LA, Baumgartner WH, Bellazzini R, Bianchi S, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Capitanio F, Castellano S, Cavazzuti E, Ciprini S, Costa E, De Rosa A, Del Monte E, Di Gesu L, Di Marco A, Donnarumma I, Dovčiak M, Ehlert SR, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Garcia JA, Gunji S, Hayashida K, Iwakiri W, Jorstad SG, Karas V, Kitaguchi T, Kolodziejczak JJ, La Monaca F, Latronico L, Liodakis I, Maldera S, Manfreda A, Marin F, Marinucci A, Marscher AP, Marshall HL, Matt G, Mitsuishi I, Mizuno T, Ng SC-Y, O’Dell SL, Oppedisano C, Papitto A, Pavlov GG, Peirson AL, Perri M, Pesce-Rollins M, Pilia M, Poutanen J, Puccetti S, Ramsey BD, Ratheesh A, Romani RW, Sgrò C, Slane P, Soffitta P, Spandre G, Tavecchio F, Tawara Y, Tennant AF, Thomas NE, Tombesi F, Trois A, Tsygankov SS, Vink J, Wu K, Xie F. 2022. Polarized x-rays from a magnetar. Science. 378(6620), 646–650.","chicago":"Taverna, Roberto, Roberto Turolla, Fabio Muleri, Jeremy Heyl, Silvia Zane, Luca Baldini, Denis González-Caniulef, et al. “Polarized X-Rays from a Magnetar.” <i>Science</i>. American Association for the Advancement of Science, 2022. <a href=\"https://doi.org/10.1126/science.add0080\">https://doi.org/10.1126/science.add0080</a>.","ama":"Taverna R, Turolla R, Muleri F, et al. Polarized x-rays from a magnetar. <i>Science</i>. 2022;378(6620):646-650. doi:<a href=\"https://doi.org/10.1126/science.add0080\">10.1126/science.add0080</a>","mla":"Taverna, Roberto, et al. “Polarized X-Rays from a Magnetar.” <i>Science</i>, vol. 378, no. 6620, American Association for the Advancement of Science, 2022, pp. 646–50, doi:<a href=\"https://doi.org/10.1126/science.add0080\">10.1126/science.add0080</a>."},"publication_status":"published","publication":"Science","article_processing_charge":"No","year":"2022","page":"646-650","oa_version":"Preprint","arxiv":1,"_id":"15205","date_updated":"2024-04-02T07:17:25Z","intvolume":"       378","title":"Polarized x-rays from a magnetar","external_id":{"arxiv":["2205.08898"]},"month":"11","volume":378,"oa":1,"keyword":["Multidisciplinary"],"day":"03","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2205.08898"}],"abstract":[{"text":"Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 using the Imaging X-ray Polarimetry Explorer and found a linear polarization degree of 13.5 ± 0.8% averaged over the 2– to 8–kilo–electron volt band. The polarization changes with energy: The degree is 15.0 ± 1.0% at 2 to 4 kilo–electron volts, drops below the instrumental sensitivity ~4 to 5 kilo–electron volts, and rises to 35.2 ± 7.1% at 5.5 to 8 kilo–electron volts. The polarization angle also changes by 90° at ~4 to 5 kilo–electron volts. These results are consistent with a model in which thermal radiation from the magnetar surface is reprocessed by scattering off charged particles in the magnetosphere.","lang":"eng"}],"status":"public","date_published":"2022-11-03T00:00:00Z","quality_controlled":"1","scopus_import":"1","publisher":"American Association for the Advancement of Science","date_created":"2024-03-26T09:51:30Z","issue":"6620","type":"journal_article","article_type":"original","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.1126/science.add0080"},{"intvolume":"       517","title":"Testing general relativity using quasi-periodic oscillations from X-ray black holes: XTE J1550-564 and GRO J1655-40","external_id":{"arxiv":["2107.06828"]},"volume":517,"month":"09","oa":1,"_id":"15206","date_updated":"2024-04-02T07:18:07Z","article_processing_charge":"No","year":"2022","page":"1389-1397","arxiv":1,"oa_version":"Preprint","publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"language":[{"iso":"eng"}],"author":[{"full_name":"Rink, Katherine","last_name":"Rink","first_name":"Katherine"},{"orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","full_name":"Caiazzo, Ilaria","last_name":"Caiazzo"},{"first_name":"Jeremy","last_name":"Heyl","full_name":"Heyl, Jeremy"}],"citation":{"ama":"Rink K, Caiazzo I, Heyl J. Testing general relativity using quasi-periodic oscillations from X-ray black holes: XTE J1550-564 and GRO J1655-40. <i>Monthly Notices of the Royal Astronomical Society</i>. 2022;517(1):1389-1397. doi:<a href=\"https://doi.org/10.1093/mnras/stac2740\">10.1093/mnras/stac2740</a>","chicago":"Rink, Katherine, Ilaria Caiazzo, and Jeremy Heyl. “Testing General Relativity Using Quasi-Periodic Oscillations from X-Ray Black Holes: XTE J1550-564 and GRO J1655-40.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2022. <a href=\"https://doi.org/10.1093/mnras/stac2740\">https://doi.org/10.1093/mnras/stac2740</a>.","mla":"Rink, Katherine, et al. “Testing General Relativity Using Quasi-Periodic Oscillations from X-Ray Black Holes: XTE J1550-564 and GRO J1655-40.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 517, no. 1, Oxford University Press, 2022, pp. 1389–97, doi:<a href=\"https://doi.org/10.1093/mnras/stac2740\">10.1093/mnras/stac2740</a>.","ieee":"K. Rink, I. Caiazzo, and J. Heyl, “Testing general relativity using quasi-periodic oscillations from X-ray black holes: XTE J1550-564 and GRO J1655-40,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 517, no. 1. Oxford University Press, pp. 1389–1397, 2022.","short":"K. Rink, I. Caiazzo, J. Heyl, Monthly Notices of the Royal Astronomical Society 517 (2022) 1389–1397.","ista":"Rink K, Caiazzo I, Heyl J. 2022. Testing general relativity using quasi-periodic oscillations from X-ray black holes: XTE J1550-564 and GRO J1655-40. Monthly Notices of the Royal Astronomical Society. 517(1), 1389–1397.","apa":"Rink, K., Caiazzo, I., &#38; Heyl, J. (2022). Testing general relativity using quasi-periodic oscillations from X-ray black holes: XTE J1550-564 and GRO J1655-40. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stac2740\">https://doi.org/10.1093/mnras/stac2740</a>"},"publication_status":"published","publication":"Monthly Notices of the Royal Astronomical Society","article_type":"original","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","doi":"10.1093/mnras/stac2740","quality_controlled":"1","date_published":"2022-09-28T00:00:00Z","scopus_import":"1","publisher":"Oxford University Press","date_created":"2024-03-26T09:51:55Z","issue":"1","type":"journal_article","abstract":[{"text":"We use the Relativistic Precession Model (RPM) and quasi-periodic oscillation (QPO) observations from the Rossi X-ray Timing Explorer to derive constraints on the properties of the black holes that power these sources and to test general relativity (GR) in the strong field regime. We build upon past techniques by using pairs of simultaneously measured QPOs, rather than triplets, and by including characteristic frequencies from the broad noise components of the power spectra in our fits. We find the inclusion of these broad noise components causes an overestimate in masses and underestimate in spins compared to values derived independently from optical spectra. We extend the underlying space-time metric to constrain potential deviations from the predictions of GR for astrophysical black holes. To do this, we modify the RPM model to a Kerr–Newman–deSitter space-time and model changes in the radial, ecliptic, and vertical frequencies. We compare our models with X-ray data of XTE J1550-564 and GRO J1655-40 using robust statistical techniques to constrain the parameters of the black holes and the deviations from GR. For both sources, using QPO and characteristic frequency data, we constrain particular deviations from GR to be less than one part per thousand.","lang":"eng"}],"main_file_link":[{"url":"https://arxiv.org/abs/2107.06828","open_access":"1"}],"status":"public","day":"28","keyword":["Space and Planetary Science","Astronomy and Astrophysics"]},{"_id":"15207","date_updated":"2024-04-02T07:18:43Z","pmid":1,"external_id":{"pmid":["36198793"],"arxiv":["2210.01809"]},"oa":1,"volume":610,"month":"10","title":"A dense 0.1-solar-mass star in a 51-minute-orbital-period eclipsing binary","intvolume":"       610","publication_status":"published","citation":{"apa":"Burdge, K. B., El-Badry, K., Marsh, T. R., Rappaport, S., Brown, W. R., Caiazzo, I., … Prince, T. A. (2022). A dense 0.1-solar-mass star in a 51-minute-orbital-period eclipsing binary. <i>Nature</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41586-022-05195-x\">https://doi.org/10.1038/s41586-022-05195-x</a>","ista":"Burdge KB, El-Badry K, Marsh TR, Rappaport S, Brown WR, Caiazzo I, Chakrabarty D, Dhillon VS, Fuller J, Gänsicke BT, Graham MJ, Kara E, Kulkarni SR, Littlefair SP, Mróz P, Rodríguez-Gil P, Roestel J van, Simcoe RA, Bellm EC, Drake AJ, Dekany RG, Groom SL, Laher RR, Masci FJ, Riddle R, Smith RM, Prince TA. 2022. A dense 0.1-solar-mass star in a 51-minute-orbital-period eclipsing binary. Nature. 610(7932), 467–471.","short":"K.B. Burdge, K. El-Badry, T.R. Marsh, S. Rappaport, W.R. Brown, I. Caiazzo, D. Chakrabarty, V.S. Dhillon, J. Fuller, B.T. Gänsicke, M.J. Graham, E. Kara, S.R. Kulkarni, S.P. Littlefair, P. Mróz, P. Rodríguez-Gil, J. van Roestel, R.A. Simcoe, E.C. Bellm, A.J. Drake, R.G. Dekany, S.L. Groom, R.R. Laher, F.J. Masci, R. Riddle, R.M. Smith, T.A. Prince, Nature 610 (2022) 467–471.","ieee":"K. B. Burdge <i>et al.</i>, “A dense 0.1-solar-mass star in a 51-minute-orbital-period eclipsing binary,” <i>Nature</i>, vol. 610, no. 7932. Springer Nature, pp. 467–471, 2022.","mla":"Burdge, Kevin B., et al. “A Dense 0.1-Solar-Mass Star in a 51-Minute-Orbital-Period Eclipsing Binary.” <i>Nature</i>, vol. 610, no. 7932, Springer Nature, 2022, pp. 467–71, doi:<a href=\"https://doi.org/10.1038/s41586-022-05195-x\">10.1038/s41586-022-05195-x</a>.","ama":"Burdge KB, El-Badry K, Marsh TR, et al. A dense 0.1-solar-mass star in a 51-minute-orbital-period eclipsing binary. <i>Nature</i>. 2022;610(7932):467-471. doi:<a href=\"https://doi.org/10.1038/s41586-022-05195-x\">10.1038/s41586-022-05195-x</a>","chicago":"Burdge, Kevin B., Kareem El-Badry, Thomas R. Marsh, Saul Rappaport, Warren R. Brown, Ilaria Caiazzo, Deepto Chakrabarty, et al. “A Dense 0.1-Solar-Mass Star in a 51-Minute-Orbital-Period Eclipsing Binary.” <i>Nature</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41586-022-05195-x\">https://doi.org/10.1038/s41586-022-05195-x</a>."},"publication":"Nature","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0028-0836"],"eissn":["1476-4687"]},"author":[{"first_name":"Kevin B.","full_name":"Burdge, Kevin B.","last_name":"Burdge"},{"last_name":"El-Badry","full_name":"El-Badry, Kareem","first_name":"Kareem"},{"first_name":"Thomas R.","full_name":"Marsh, Thomas R.","last_name":"Marsh"},{"last_name":"Rappaport","full_name":"Rappaport, Saul","first_name":"Saul"},{"first_name":"Warren R.","full_name":"Brown, Warren R.","last_name":"Brown"},{"id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","first_name":"Ilaria","orcid":"0000-0002-4770-5388","last_name":"Caiazzo","full_name":"Caiazzo, Ilaria"},{"last_name":"Chakrabarty","full_name":"Chakrabarty, Deepto","first_name":"Deepto"},{"last_name":"Dhillon","full_name":"Dhillon, V. S.","first_name":"V. S."},{"first_name":"Jim","last_name":"Fuller","full_name":"Fuller, Jim"},{"full_name":"Gänsicke, Boris T.","last_name":"Gänsicke","first_name":"Boris T."},{"first_name":"Matthew J.","full_name":"Graham, Matthew J.","last_name":"Graham"},{"first_name":"Erin","full_name":"Kara, Erin","last_name":"Kara"},{"first_name":"S. R.","last_name":"Kulkarni","full_name":"Kulkarni, S. R."},{"first_name":"S. P.","full_name":"Littlefair, S. P.","last_name":"Littlefair"},{"last_name":"Mróz","full_name":"Mróz, Przemek","first_name":"Przemek"},{"first_name":"Pablo","full_name":"Rodríguez-Gil, Pablo","last_name":"Rodríguez-Gil"},{"first_name":"Jan van","last_name":"Roestel","full_name":"Roestel, Jan van"},{"last_name":"Simcoe","full_name":"Simcoe, Robert A.","first_name":"Robert A."},{"first_name":"Eric C.","full_name":"Bellm, Eric C.","last_name":"Bellm"},{"last_name":"Drake","full_name":"Drake, Andrew J.","first_name":"Andrew J."},{"full_name":"Dekany, Richard G.","last_name":"Dekany","first_name":"Richard G."},{"first_name":"Steven L.","last_name":"Groom","full_name":"Groom, Steven L."},{"last_name":"Laher","full_name":"Laher, Russ R.","first_name":"Russ R."},{"full_name":"Masci, Frank J.","last_name":"Masci","first_name":"Frank J."},{"first_name":"Reed","full_name":"Riddle, Reed","last_name":"Riddle"},{"last_name":"Smith","full_name":"Smith, Roger M.","first_name":"Roger M."},{"first_name":"Thomas A.","full_name":"Prince, Thomas A.","last_name":"Prince"}],"page":"467-471","arxiv":1,"oa_version":"Preprint","article_processing_charge":"No","year":"2022","type":"journal_article","issue":"7932","quality_controlled":"1","date_published":"2022-10-05T00:00:00Z","publisher":"Springer Nature","date_created":"2024-03-26T09:52:17Z","scopus_import":"1","article_type":"original","doi":"10.1038/s41586-022-05195-x","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","day":"05","main_file_link":[{"url":"https://arxiv.org/abs/2210.01809","open_access":"1"}],"abstract":[{"text":"Of more than a thousand known cataclysmic variables (CVs), where a white dwarf is accreting from a hydrogen-rich star, only a dozen have orbital periods below 75 minutes1,2,3,4,5,6,7,8,9. One way to achieve these short periods requires the donor star to have undergone substantial nuclear evolution before interacting with the white dwarf10,11,12,13,14, and it is expected that these objects will transition to helium accretion. These transitional CVs have been proposed as progenitors of helium CVs13,14,15,16,17,18. However, no known transitional CV is expected to reach an orbital period short enough to account for most of the helium CV population, leaving the role of this evolutionary pathway unclear. Here we report observations of ZTF J1813+4251, a 51-minute-orbital-period, fully eclipsing binary system consisting of a star with a temperature comparable to that of the Sun but a density 100 times greater owing to its helium-rich composition, accreting onto a white dwarf. Phase-resolved spectra, multi-band light curves and the broadband spectral energy distribution allow us to obtain precise and robust constraints on the masses, radii and temperatures of both components. Evolutionary modelling shows that ZTF J1813+4251 is destined to become a helium CV binary, reaching an orbital period under 20 minutes, rendering ZTF J1813+4251 a previously missing link between helium CV binaries and hydrogen-rich CVs.","lang":"eng"}],"status":"public"},{"external_id":{"arxiv":["2112.03401"]},"oa":1,"month":"06","volume":514,"title":"Probing magnetar emission mechanisms with X-ray spectropolarimetry","intvolume":"       514","_id":"15208","date_updated":"2024-10-14T12:32:39Z","page":"5024-5034","oa_version":"Preprint","arxiv":1,"article_processing_charge":"No","year":"2022","publication_status":"published","citation":{"chicago":"Caiazzo, Ilaria, Denis González-Caniulef, Jeremy Heyl, and Rodrigo Fernández. “Probing Magnetar Emission Mechanisms with X-Ray Spectropolarimetry.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2022. <a href=\"https://doi.org/10.1093/mnras/stac1571\">https://doi.org/10.1093/mnras/stac1571</a>.","ama":"Caiazzo I, González-Caniulef D, Heyl J, Fernández R. Probing magnetar emission mechanisms with X-ray spectropolarimetry. <i>Monthly Notices of the Royal Astronomical Society</i>. 2022;514(4):5024-5034. doi:<a href=\"https://doi.org/10.1093/mnras/stac1571\">10.1093/mnras/stac1571</a>","mla":"Caiazzo, Ilaria, et al. “Probing Magnetar Emission Mechanisms with X-Ray Spectropolarimetry.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 514, no. 4, Oxford University Press, 2022, pp. 5024–34, doi:<a href=\"https://doi.org/10.1093/mnras/stac1571\">10.1093/mnras/stac1571</a>.","short":"I. Caiazzo, D. González-Caniulef, J. Heyl, R. Fernández, Monthly Notices of the Royal Astronomical Society 514 (2022) 5024–5034.","ieee":"I. Caiazzo, D. González-Caniulef, J. Heyl, and R. Fernández, “Probing magnetar emission mechanisms with X-ray spectropolarimetry,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 514, no. 4. Oxford University Press, pp. 5024–5034, 2022.","ista":"Caiazzo I, González-Caniulef D, Heyl J, Fernández R. 2022. Probing magnetar emission mechanisms with X-ray spectropolarimetry. Monthly Notices of the Royal Astronomical Society. 514(4), 5024–5034.","apa":"Caiazzo, I., González-Caniulef, D., Heyl, J., &#38; Fernández, R. (2022). Probing magnetar emission mechanisms with X-ray spectropolarimetry. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stac1571\">https://doi.org/10.1093/mnras/stac1571</a>"},"publication":"Monthly Notices of the Royal Astronomical Society","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"author":[{"id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","first_name":"Ilaria","orcid":"0000-0002-4770-5388","last_name":"Caiazzo","full_name":"Caiazzo, Ilaria"},{"full_name":"González-Caniulef, Denis","last_name":"González-Caniulef","first_name":"Denis"},{"full_name":"Heyl, Jeremy","last_name":"Heyl","first_name":"Jeremy"},{"last_name":"Fernández","full_name":"Fernández, Rodrigo","first_name":"Rodrigo"}],"article_type":"original","doi":"10.1093/mnras/stac1571","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"journal_article","issue":"4","date_published":"2022-06-09T00:00:00Z","quality_controlled":"1","publisher":"Oxford University Press","date_created":"2024-03-26T09:52:41Z","scopus_import":"1","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2112.03401"}],"abstract":[{"lang":"eng","text":"This year, a new era of observations of compact objects in X-ray polarization is commencing. Among the key targets for the Imaging X-ray Polarimetry Explorer mission are the magnetars 4U 0142+61 and 1RXS J170849.0-400910. Here, we present detailed predictions of the expected polarization from these sources that incorporate realistic models of emission physics at the surface (gaseous or condensed), the temperature distribution on the surface, general relativity, quantum electrodynamics, and scattering in the magnetosphere, accounting for the broad-band spectral energy distribution from below 1 keV to nearly 100 keV. We find that either atmospheres or condensed surfaces can account for the emission at a few keV. In both cases, either a small hot polar cap or scattering is required to account for the emission at 5–10 keV and, above 10 keV, scattering by a hard population of electrons can account for the rising power in the hard X-rays observed in many magnetars in quiescence. Although these different scenarios result in very similar spectral energy distributions, they generate dramatically different polarization signatures from 2 to 8 keV, which is the range of sensitivity of the Imaging X-ray Polarimetry Explorer. Observations of these sources in X-ray polarization will therefore probe the emission from magnetars in an essentially new way."}],"status":"public","day":"09","keyword":["Space and Planetary Science","Astronomy and Astrophysics"]},{"author":[{"first_name":"Sivan","full_name":"Ginzburg, Sivan","last_name":"Ginzburg"},{"first_name":"Jim","last_name":"Fuller","full_name":"Fuller, Jim"},{"last_name":"Kawka","full_name":"Kawka, Adela","first_name":"Adela"},{"full_name":"Caiazzo, Ilaria","last_name":"Caiazzo","orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d"}],"publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"language":[{"iso":"eng"}],"publication":"Monthly Notices of the Royal Astronomical Society","citation":{"apa":"Ginzburg, S., Fuller, J., Kawka, A., &#38; Caiazzo, I. (2022). Slow convection and fast rotation in crystallization-driven white dwarf dynamos. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stac1363\">https://doi.org/10.1093/mnras/stac1363</a>","ista":"Ginzburg S, Fuller J, Kawka A, Caiazzo I. 2022. Slow convection and fast rotation in crystallization-driven white dwarf dynamos. Monthly Notices of the Royal Astronomical Society. 514(3), 4111–4119.","ieee":"S. Ginzburg, J. Fuller, A. Kawka, and I. Caiazzo, “Slow convection and fast rotation in crystallization-driven white dwarf dynamos,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 514, no. 3. Oxford University Press, pp. 4111–4119, 2022.","short":"S. Ginzburg, J. Fuller, A. Kawka, I. Caiazzo, Monthly Notices of the Royal Astronomical Society 514 (2022) 4111–4119.","mla":"Ginzburg, Sivan, et al. “Slow Convection and Fast Rotation in Crystallization-Driven White Dwarf Dynamos.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 514, no. 3, Oxford University Press, 2022, pp. 4111–19, doi:<a href=\"https://doi.org/10.1093/mnras/stac1363\">10.1093/mnras/stac1363</a>.","chicago":"Ginzburg, Sivan, Jim Fuller, Adela Kawka, and Ilaria Caiazzo. “Slow Convection and Fast Rotation in Crystallization-Driven White Dwarf Dynamos.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2022. <a href=\"https://doi.org/10.1093/mnras/stac1363\">https://doi.org/10.1093/mnras/stac1363</a>.","ama":"Ginzburg S, Fuller J, Kawka A, Caiazzo I. Slow convection and fast rotation in crystallization-driven white dwarf dynamos. <i>Monthly Notices of the Royal Astronomical Society</i>. 2022;514(3):4111-4119. doi:<a href=\"https://doi.org/10.1093/mnras/stac1363\">10.1093/mnras/stac1363</a>"},"publication_status":"published","year":"2022","article_processing_charge":"No","oa_version":"Preprint","arxiv":1,"page":"4111-4119","date_updated":"2024-04-02T07:24:15Z","_id":"15209","intvolume":"       514","title":"Slow convection and fast rotation in crystallization-driven white dwarf dynamos","volume":514,"month":"05","oa":1,"external_id":{"arxiv":["2202.12902"]},"day":"16","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"status":"public","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2202.12902"}],"abstract":[{"lang":"eng","text":"It has been recently suggested that white dwarfs generate magnetic fields in a process analogous to the Earth. The crystallization of the core creates a compositional inversion that drives convection, and combined with rotation, this can sustain a magnetic dynamo. We reanalyse the dynamo mechanism, arising from the slow crystallization of the core, and find convective turnover times tconv of weeks to months – longer by orders of magnitude than previously thought. With white dwarf spin periods P ≪ tconv, crystallization-driven dynamos are almost always in the fast-rotating regime, where the magnetic field B is at least in equipartition with the convective motion and is possibly further enhanced by a factor of B ∝ (tconv/P)1/2, depending on the assumed dynamo scaling law. We track the growth of the crystallized core using MESA and compute the magnetic field B(Teff) as a function of the white dwarf’s effective temperature Teff. We compare this prediction with observations and show that crystallization-driven dynamos can explain some – but not all – of the ∼MG magnetic fields measured for single white dwarfs, as well as the stronger fields measured for white dwarfs in cataclysmic variables, which were spun up by mass accretion to short P. Our B(Teff) curves might also explain the clustering of white dwarfs with Balmer emission lines around Teff ≈ 7500 K."}],"scopus_import":"1","date_created":"2024-03-26T09:53:04Z","publisher":"Oxford University Press","date_published":"2022-05-16T00:00:00Z","quality_controlled":"1","issue":"3","type":"journal_article","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.1093/mnras/stac1363","article_type":"original"},{"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.3847/2041-8213/ac6585","article_type":"original","scopus_import":"1","date_created":"2024-03-26T10:28:48Z","publisher":"American Astronomical Society","quality_controlled":"1","date_published":"2022-05-30T00:00:00Z","issue":"2","type":"journal_article","status":"public","main_file_link":[{"open_access":"1","url":"https://doi.org/10.3847/2041-8213/ac6585"}],"abstract":[{"text":"The maximum mass of a star that can produce a white dwarf (WD) is an important astrophysical quantity. One of the best approaches to establishing this limit is to search for WDs in young star clusters in which only massive stars have had time to evolve and where the mass of the progenitor can be established from the cooling time of the WD together with the age of the cluster. Searches in young Milky Way clusters have not thus far yielded WD members more massive than about 1.1 M⊙, well below the Chandrasekhar mass of 1.38 M⊙, nor progenitors with masses in excess of about 6 M⊙. However, the hunt for potentially massive WDs that escaped their cluster environs is yielding interesting candidates. To expand the cluster sample further, we used HST to survey four young and massive star clusters in the Magellanic Clouds for bright WDs that could have evolved from stars as massive as 10 M⊙. We located five potential WD candidates in the oldest of the four clusters examined, the first extragalactic single WDs thus far discovered. As these hot WDs are very faint at optical wavelengths, final confirmation will likely have to await spectroscopy with 30 m class telescopes.","lang":"eng"}],"day":"30","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"intvolume":"       931","title":"When do stars go boom?","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"month":"05","volume":931,"oa":1,"external_id":{"arxiv":["2203.11264"]},"date_updated":"2024-04-02T07:25:50Z","_id":"15210","year":"2022","article_processing_charge":"No","arxiv":1,"oa_version":"Published Version","author":[{"first_name":"Harvey B.","last_name":"Richer","full_name":"Richer, Harvey B."},{"first_name":"Roger E.","last_name":"Cohen","full_name":"Cohen, Roger E."},{"last_name":"Heyl","full_name":"Heyl, Jeremy","first_name":"Jeremy"},{"first_name":"Jason","full_name":"Kalirai, Jason","last_name":"Kalirai"},{"orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","full_name":"Caiazzo, Ilaria","last_name":"Caiazzo"},{"last_name":"Correnti","full_name":"Correnti, Matteo","first_name":"Matteo"},{"last_name":"Cummings","full_name":"Cummings, Jeffrey","first_name":"Jeffrey"},{"first_name":"Paul","full_name":"Goudfrooij, Paul","last_name":"Goudfrooij"},{"last_name":"Hansen","full_name":"Hansen, Bradley M. S.","first_name":"Bradley M. S."},{"last_name":"Peeples","full_name":"Peeples, Molly","first_name":"Molly"},{"full_name":"Sabbi, Elena","last_name":"Sabbi","first_name":"Elena"},{"last_name":"Tremblay","full_name":"Tremblay, Pier-Emmanuel","first_name":"Pier-Emmanuel"},{"first_name":"Benjamin","last_name":"Williams","full_name":"Williams, Benjamin"}],"publication_identifier":{"eissn":["2041-8213"],"issn":["2041-8205"]},"language":[{"iso":"eng"}],"publication":"The Astrophysical Journal Letters","citation":{"mla":"Richer, Harvey B., et al. “When Do Stars Go Boom?” <i>The Astrophysical Journal Letters</i>, vol. 931, no. 2, L20, American Astronomical Society, 2022, doi:<a href=\"https://doi.org/10.3847/2041-8213/ac6585\">10.3847/2041-8213/ac6585</a>.","chicago":"Richer, Harvey B., Roger E. Cohen, Jeremy Heyl, Jason Kalirai, Ilaria Caiazzo, Matteo Correnti, Jeffrey Cummings, et al. “When Do Stars Go Boom?” <i>The Astrophysical Journal Letters</i>. American Astronomical Society, 2022. <a href=\"https://doi.org/10.3847/2041-8213/ac6585\">https://doi.org/10.3847/2041-8213/ac6585</a>.","ama":"Richer HB, Cohen RE, Heyl J, et al. When do stars go boom? <i>The Astrophysical Journal Letters</i>. 2022;931(2). doi:<a href=\"https://doi.org/10.3847/2041-8213/ac6585\">10.3847/2041-8213/ac6585</a>","ista":"Richer HB, Cohen RE, Heyl J, Kalirai J, Caiazzo I, Correnti M, Cummings J, Goudfrooij P, Hansen BMS, Peeples M, Sabbi E, Tremblay P-E, Williams B. 2022. When do stars go boom? The Astrophysical Journal Letters. 931(2), L20.","apa":"Richer, H. B., Cohen, R. E., Heyl, J., Kalirai, J., Caiazzo, I., Correnti, M., … Williams, B. (2022). When do stars go boom? <i>The Astrophysical Journal Letters</i>. American Astronomical Society. <a href=\"https://doi.org/10.3847/2041-8213/ac6585\">https://doi.org/10.3847/2041-8213/ac6585</a>","ieee":"H. B. Richer <i>et al.</i>, “When do stars go boom?,” <i>The Astrophysical Journal Letters</i>, vol. 931, no. 2. American Astronomical Society, 2022.","short":"H.B. Richer, R.E. Cohen, J. Heyl, J. Kalirai, I. Caiazzo, M. Correnti, J. Cummings, P. Goudfrooij, B.M.S. Hansen, M. Peeples, E. Sabbi, P.-E. Tremblay, B. Williams, The Astrophysical Journal Letters 931 (2022)."},"article_number":"L20","publication_status":"published"},{"title":"A 62-minute orbital period black widow binary in a wide hierarchical triple","intvolume":"       605","oa":1,"month":"05","volume":605,"external_id":{"pmid":["35508781"],"arxiv":["2205.02278"]},"pmid":1,"date_updated":"2024-04-02T07:26:19Z","_id":"15211","year":"2022","article_processing_charge":"No","arxiv":1,"oa_version":"Preprint","page":"41-45","author":[{"first_name":"Kevin B.","last_name":"Burdge","full_name":"Burdge, Kevin B."},{"last_name":"Marsh","full_name":"Marsh, Thomas R.","first_name":"Thomas R."},{"first_name":"Jim","full_name":"Fuller, Jim","last_name":"Fuller"},{"full_name":"Bellm, Eric C.","last_name":"Bellm","first_name":"Eric C."},{"first_name":"Ilaria","orcid":"0000-0002-4770-5388","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","full_name":"Caiazzo, Ilaria","last_name":"Caiazzo"},{"last_name":"Chakrabarty","full_name":"Chakrabarty, Deepto","first_name":"Deepto"},{"first_name":"Michael W.","last_name":"Coughlin","full_name":"Coughlin, Michael W."},{"full_name":"De, Kishalay","last_name":"De","first_name":"Kishalay"},{"first_name":"V. S.","last_name":"Dhillon","full_name":"Dhillon, V. S."},{"last_name":"Graham","full_name":"Graham, Matthew J.","first_name":"Matthew J."},{"last_name":"Rodríguez-Gil","full_name":"Rodríguez-Gil, Pablo","first_name":"Pablo"},{"last_name":"Jaodand","full_name":"Jaodand, Amruta D.","first_name":"Amruta D."},{"first_name":"David L.","last_name":"Kaplan","full_name":"Kaplan, David L."},{"full_name":"Kara, Erin","last_name":"Kara","first_name":"Erin"},{"full_name":"Kong, Albert K. H.","last_name":"Kong","first_name":"Albert K. H."},{"full_name":"Kulkarni, S. R.","last_name":"Kulkarni","first_name":"S. R."},{"first_name":"Kwan-Lok","last_name":"Li","full_name":"Li, Kwan-Lok"},{"full_name":"Littlefair, S. P.","last_name":"Littlefair","first_name":"S. P."},{"full_name":"Majid, Walid A.","last_name":"Majid","first_name":"Walid A."},{"full_name":"Mróz, Przemek","last_name":"Mróz","first_name":"Przemek"},{"first_name":"Aaron B.","full_name":"Pearlman, Aaron B.","last_name":"Pearlman"},{"last_name":"Phinney","full_name":"Phinney, E. S.","first_name":"E. S."},{"first_name":"Jan van","full_name":"Roestel, Jan van","last_name":"Roestel"},{"first_name":"Robert A.","full_name":"Simcoe, Robert A.","last_name":"Simcoe"},{"full_name":"Andreoni, Igor","last_name":"Andreoni","first_name":"Igor"},{"last_name":"Drake","full_name":"Drake, Andrew J.","first_name":"Andrew J."},{"last_name":"Dekany","full_name":"Dekany, Richard G.","first_name":"Richard G."},{"full_name":"Duev, Dmitry A.","last_name":"Duev","first_name":"Dmitry A."},{"first_name":"Erik C.","last_name":"Kool","full_name":"Kool, Erik C."},{"last_name":"Mahabal","full_name":"Mahabal, Ashish A.","first_name":"Ashish A."},{"full_name":"Medford, Michael S.","last_name":"Medford","first_name":"Michael S."},{"first_name":"Reed","full_name":"Riddle, Reed","last_name":"Riddle"},{"full_name":"Prince, Thomas A.","last_name":"Prince","first_name":"Thomas A."}],"language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1476-4687"],"issn":["0028-0836"]},"publication":"Nature","publication_status":"published","citation":{"apa":"Burdge, K. B., Marsh, T. R., Fuller, J., Bellm, E. C., Caiazzo, I., Chakrabarty, D., … Prince, T. A. (2022). A 62-minute orbital period black widow binary in a wide hierarchical triple. <i>Nature</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41586-022-04551-1\">https://doi.org/10.1038/s41586-022-04551-1</a>","ista":"Burdge KB, Marsh TR, Fuller J, Bellm EC, Caiazzo I, Chakrabarty D, Coughlin MW, De K, Dhillon VS, Graham MJ, Rodríguez-Gil P, Jaodand AD, Kaplan DL, Kara E, Kong AKH, Kulkarni SR, Li K-L, Littlefair SP, Majid WA, Mróz P, Pearlman AB, Phinney ES, Roestel J van, Simcoe RA, Andreoni I, Drake AJ, Dekany RG, Duev DA, Kool EC, Mahabal AA, Medford MS, Riddle R, Prince TA. 2022. A 62-minute orbital period black widow binary in a wide hierarchical triple. Nature. 605(7908), 41–45.","short":"K.B. Burdge, T.R. Marsh, J. Fuller, E.C. Bellm, I. Caiazzo, D. Chakrabarty, M.W. Coughlin, K. De, V.S. Dhillon, M.J. Graham, P. Rodríguez-Gil, A.D. Jaodand, D.L. Kaplan, E. Kara, A.K.H. Kong, S.R. Kulkarni, K.-L. Li, S.P. Littlefair, W.A. Majid, P. Mróz, A.B. Pearlman, E.S. Phinney, J. van Roestel, R.A. Simcoe, I. Andreoni, A.J. Drake, R.G. Dekany, D.A. Duev, E.C. Kool, A.A. Mahabal, M.S. Medford, R. Riddle, T.A. Prince, Nature 605 (2022) 41–45.","ieee":"K. B. Burdge <i>et al.</i>, “A 62-minute orbital period black widow binary in a wide hierarchical triple,” <i>Nature</i>, vol. 605, no. 7908. Springer Nature, pp. 41–45, 2022.","mla":"Burdge, Kevin B., et al. “A 62-Minute Orbital Period Black Widow Binary in a Wide Hierarchical Triple.” <i>Nature</i>, vol. 605, no. 7908, Springer Nature, 2022, pp. 41–45, doi:<a href=\"https://doi.org/10.1038/s41586-022-04551-1\">10.1038/s41586-022-04551-1</a>.","chicago":"Burdge, Kevin B., Thomas R. Marsh, Jim Fuller, Eric C. Bellm, Ilaria Caiazzo, Deepto Chakrabarty, Michael W. Coughlin, et al. “A 62-Minute Orbital Period Black Widow Binary in a Wide Hierarchical Triple.” <i>Nature</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41586-022-04551-1\">https://doi.org/10.1038/s41586-022-04551-1</a>.","ama":"Burdge KB, Marsh TR, Fuller J, et al. A 62-minute orbital period black widow binary in a wide hierarchical triple. <i>Nature</i>. 2022;605(7908):41-45. doi:<a href=\"https://doi.org/10.1038/s41586-022-04551-1\">10.1038/s41586-022-04551-1</a>"},"doi":"10.1038/s41586-022-04551-1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","article_type":"original","publisher":"Springer Nature","date_created":"2024-03-26T10:29:26Z","scopus_import":"1","date_published":"2022-05-04T00:00:00Z","quality_controlled":"1","type":"journal_article","issue":"7908","status":"public","abstract":[{"text":"Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original ‘black widow’, the eight-hour orbital period eclipsing pulsar PSR J1959+2048 (PSR B1957+20)1, high-energy emission originating from the pulsar2 is irradiating and may eventually destroy3 a low-mass companion. These systems are not only physical laboratories that reveal the interesting results of exposing a close companion star to the relativistic energy output of a pulsar, but are also believed to harbour some of the most massive neutron stars4, allowing for robust tests of the neutron star equation of state. Here we report observations of ZTF J1406+1222, a wide hierarchical triple hosting a 62-minute orbital period black widow candidate, the optical flux of which varies by a factor of more than ten. ZTF J1406+1222 pushes the boundaries of evolutionary models5, falling below the 80-minute minimum orbital period of hydrogen-rich systems. The wide tertiary companion is a rare low-metallicity cool subdwarf star, and the system has a Galactic halo orbit consistent with passing near the Galactic Centre, making it a probe of formation channels, neutron star kick physics6 and binary evolution.","lang":"eng"}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2205.02278"}],"keyword":["Multidisciplinary"],"day":"04"},{"author":[{"first_name":"Leesa","last_name":"Fleury","full_name":"Fleury, Leesa"},{"last_name":"Caiazzo","full_name":"Caiazzo, Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","first_name":"Ilaria","orcid":"0000-0002-4770-5388"},{"full_name":"Heyl, Jeremy","last_name":"Heyl","first_name":"Jeremy"}],"language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"publication":"Monthly Notices of the Royal Astronomical Society","publication_status":"published","citation":{"mla":"Fleury, Leesa, et al. “The Cooling of Massive White Dwarfs from <i>Gaia</i> EDR3.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 511, no. 4, Oxford University Press, 2022, pp. 5984–93, doi:<a href=\"https://doi.org/10.1093/mnras/stac458\">10.1093/mnras/stac458</a>.","ama":"Fleury L, Caiazzo I, Heyl J. The cooling of massive white dwarfs from <i>Gaia</i> EDR3. <i>Monthly Notices of the Royal Astronomical Society</i>. 2022;511(4):5984-5993. doi:<a href=\"https://doi.org/10.1093/mnras/stac458\">10.1093/mnras/stac458</a>","chicago":"Fleury, Leesa, Ilaria Caiazzo, and Jeremy Heyl. “The Cooling of Massive White Dwarfs from <i>Gaia</i> EDR3.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2022. <a href=\"https://doi.org/10.1093/mnras/stac458\">https://doi.org/10.1093/mnras/stac458</a>.","apa":"Fleury, L., Caiazzo, I., &#38; Heyl, J. (2022). The cooling of massive white dwarfs from <i>Gaia</i> EDR3. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stac458\">https://doi.org/10.1093/mnras/stac458</a>","ista":"Fleury L, Caiazzo I, Heyl J. 2022. The cooling of massive white dwarfs from <i>Gaia</i> EDR3. Monthly Notices of the Royal Astronomical Society. 511(4), 5984–5993.","ieee":"L. Fleury, I. Caiazzo, and J. Heyl, “The cooling of massive white dwarfs from <i>Gaia</i> EDR3,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 511, no. 4. Oxford University Press, pp. 5984–5993, 2022.","short":"L. Fleury, I. Caiazzo, J. Heyl, Monthly Notices of the Royal Astronomical Society 511 (2022) 5984–5993."},"year":"2022","article_processing_charge":"No","oa_version":"Preprint","arxiv":1,"page":"5984-5993","date_updated":"2024-04-02T07:26:50Z","_id":"15212","title":"The cooling of massive white dwarfs from <i>Gaia</i> EDR3","intvolume":"       511","oa":1,"month":"02","volume":511,"external_id":{"arxiv":["2110.00598"]},"day":"21","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"status":"public","main_file_link":[{"url":"https://arxiv.org/abs/2110.00598","open_access":"1"}],"abstract":[{"lang":"eng","text":"We determine the distribution of cooling ages of massive Gaia EDR3 white dwarfs identified with over 90 per cent probability within 200 pc and with mass in the range 0.95–1.25 M⊙. Using three sets of publicly available models, we consider sub-samples of these white dwarfs sorted into three equally spaced mass bins. Under the assumption of a constant white dwarf formation rate, we find an excess of white dwarfs, both along the Q branch and below it, corresponding respectively to stars that are in the process of freezing and those that are completely frozen. We compare the cooling age distributions for each of these bins to the recently determined time-varying star formation rate of Gaia DR2 main sequence stars. For white dwarfs in the two lightest mass bins, spanning the mass range 0.95–1.15 M⊙, we find that the cumulative cooling age distribution is statistically consistent with the expectation from the star formation rate. For white dwarfs in the heaviest mass bin, 1.15–1.25 M⊙, we find that their cumulative distribution is inconsistent with the star formation rate for all of the models considered; instead, we find that their cooling age distribution is well fitted by a linear combination of the distribution expected for single stellar evolution products and the distribution expected for double white dwarf merger products when approximately 40–50 per cent of the 1.15–1.25 M⊙ white dwarfs that formed over the past 4 Gyr are produced through double white dwarf mergers."}],"date_created":"2024-03-26T10:31:05Z","publisher":"Oxford University Press","scopus_import":"1","date_published":"2022-02-21T00:00:00Z","quality_controlled":"1","type":"journal_article","issue":"4","doi":"10.1093/mnras/stac458","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original"},{"status":"public","main_file_link":[{"open_access":"1","url":"https://doi.org/10.3847/2041-8213/ac50a5"}],"abstract":[{"lang":"eng","text":"We searched through the entire Gaia EDR3 candidate white dwarf catalog for stars with proper motions and positions that are consistent with them having escaped from the Alpha Persei cluster within the past 81 Myr, the age of the cluster. In this search we found five candidate white dwarf escapees from Alpha Persei and obtained spectra for all of them. We confirm that three are massive white dwarfs sufficiently young to have originated in the cluster. All these are more massive than any white dwarf previously associated with a cluster using Gaia astrometry, and possess some of the most massive progenitors. In particular, the white dwarf Gaia EDR3 4395978097863572, which lies within 25 pc of the cluster center, has a mass of about 1.20 solar masses and evolved from an 8.5 solar-mass star, pushing the upper limit for white dwarf formation from a single massive star, while still leaving a substantial gap between the resulting white dwarf mass and the Chandrasekhar mass."}],"day":"21","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.3847/2041-8213/ac50a5","article_type":"original","issue":"2","type":"journal_article","scopus_import":"1","publisher":"American Astronomical Society","date_created":"2024-03-26T10:31:25Z","date_published":"2022-02-21T00:00:00Z","quality_controlled":"1","oa_version":"Published Version","arxiv":1,"year":"2022","article_processing_charge":"No","publication":"The Astrophysical Journal Letters","citation":{"ama":"Miller DR, Caiazzo I, Heyl J, Richer HB, Tremblay P-E. The ultramassive white dwarfs of the Alpha Persei cluster. <i>The Astrophysical Journal Letters</i>. 2022;926(2). doi:<a href=\"https://doi.org/10.3847/2041-8213/ac50a5\">10.3847/2041-8213/ac50a5</a>","chicago":"Miller, David R., Ilaria Caiazzo, Jeremy Heyl, Harvey B. Richer, and Pier-Emmanuel Tremblay. “The Ultramassive White Dwarfs of the Alpha Persei Cluster.” <i>The Astrophysical Journal Letters</i>. American Astronomical Society, 2022. <a href=\"https://doi.org/10.3847/2041-8213/ac50a5\">https://doi.org/10.3847/2041-8213/ac50a5</a>.","mla":"Miller, David R., et al. “The Ultramassive White Dwarfs of the Alpha Persei Cluster.” <i>The Astrophysical Journal Letters</i>, vol. 926, no. 2, L24, American Astronomical Society, 2022, doi:<a href=\"https://doi.org/10.3847/2041-8213/ac50a5\">10.3847/2041-8213/ac50a5</a>.","ieee":"D. R. Miller, I. Caiazzo, J. Heyl, H. B. Richer, and P.-E. Tremblay, “The ultramassive white dwarfs of the Alpha Persei cluster,” <i>The Astrophysical Journal Letters</i>, vol. 926, no. 2. American Astronomical Society, 2022.","short":"D.R. Miller, I. Caiazzo, J. Heyl, H.B. Richer, P.-E. Tremblay, The Astrophysical Journal Letters 926 (2022).","ista":"Miller DR, Caiazzo I, Heyl J, Richer HB, Tremblay P-E. 2022. The ultramassive white dwarfs of the Alpha Persei cluster. The Astrophysical Journal Letters. 926(2), L24.","apa":"Miller, D. R., Caiazzo, I., Heyl, J., Richer, H. B., &#38; Tremblay, P.-E. (2022). The ultramassive white dwarfs of the Alpha Persei cluster. <i>The Astrophysical Journal Letters</i>. American Astronomical Society. <a href=\"https://doi.org/10.3847/2041-8213/ac50a5\">https://doi.org/10.3847/2041-8213/ac50a5</a>"},"article_number":"L24","publication_status":"published","author":[{"first_name":"David R.","full_name":"Miller, David R.","last_name":"Miller"},{"last_name":"Caiazzo","full_name":"Caiazzo, Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d","first_name":"Ilaria","orcid":"0000-0002-4770-5388"},{"first_name":"Jeremy","last_name":"Heyl","full_name":"Heyl, Jeremy"},{"first_name":"Harvey B.","last_name":"Richer","full_name":"Richer, Harvey B."},{"first_name":"Pier-Emmanuel","last_name":"Tremblay","full_name":"Tremblay, Pier-Emmanuel"}],"publication_identifier":{"eissn":["2041-8213"],"issn":["2041-8205"]},"language":[{"iso":"eng"}],"volume":926,"month":"02","oa":1,"external_id":{"arxiv":["2110.09668"]},"intvolume":"       926","title":"The ultramassive white dwarfs of the Alpha Persei cluster","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"date_updated":"2024-04-02T07:27:20Z","_id":"15213"}]