[{"date_updated":"2026-06-09T22:31:07Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Published Version","_id":"66","publication_status":"published","article_processing_charge":"No","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"publisher":"Schloss Dagstuhl - Leibniz-Zentrum für Informatik","quality_controlled":"1","department":[{"_id":"KrCh"}],"month":"09","publist_id":"7988","scopus_import":"1","project":[{"_id":"25892FC0-B435-11E9-9278-68D0E5697425","name":"Efficient Algorithms for Computer Aided Verification","grant_number":"ICT15-003"},{"name":"Quantitative Graph Games: Theory and Applications","_id":"2581B60A-B435-11E9-9278-68D0E5697425","grant_number":"279307","call_identifier":"FP7"},{"name":"Rigorous Systems Engineering","_id":"25832EC2-B435-11E9-9278-68D0E5697425","grant_number":"S 11407_N23","call_identifier":"FWF"},{"_id":"266EEEC0-B435-11E9-9278-68D0E5697425","name":"Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts"}],"type":"conference","day":"01","volume":118,"doi":"10.4230/LIPIcs.CONCUR.2018.11","related_material":{"record":[{"relation":"dissertation_contains","id":"8934","status":"public"}]},"citation":{"apa":"Chatterjee, K., Goharshady, A. K., Ibsen-Jensen, R., &#38; Velner, Y. (2018). Ergodic mean-payoff games for the analysis of attacks in crypto-currencies (Vol. 118). Presented at the CONCUR: Conference on Concurrency Theory, Beijing, China: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.CONCUR.2018.11\">https://doi.org/10.4230/LIPIcs.CONCUR.2018.11</a>","chicago":"Chatterjee, Krishnendu, Amir Kafshdar Goharshady, Rasmus Ibsen-Jensen, and Yaron Velner. “Ergodic Mean-Payoff Games for the Analysis of Attacks in Crypto-Currencies,” Vol. 118. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2018. <a href=\"https://doi.org/10.4230/LIPIcs.CONCUR.2018.11\">https://doi.org/10.4230/LIPIcs.CONCUR.2018.11</a>.","mla":"Chatterjee, Krishnendu, et al. <i>Ergodic Mean-Payoff Games for the Analysis of Attacks in Crypto-Currencies</i>. Vol. 118, 11, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2018, doi:<a href=\"https://doi.org/10.4230/LIPIcs.CONCUR.2018.11\">10.4230/LIPIcs.CONCUR.2018.11</a>.","ama":"Chatterjee K, Goharshady AK, Ibsen-Jensen R, Velner Y. Ergodic mean-payoff games for the analysis of attacks in crypto-currencies. In: Vol 118. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2018. doi:<a href=\"https://doi.org/10.4230/LIPIcs.CONCUR.2018.11\">10.4230/LIPIcs.CONCUR.2018.11</a>","ieee":"K. Chatterjee, A. K. Goharshady, R. Ibsen-Jensen, and Y. Velner, “Ergodic mean-payoff games for the analysis of attacks in crypto-currencies,” presented at the CONCUR: Conference on Concurrency Theory, Beijing, China, 2018, vol. 118.","short":"K. Chatterjee, A.K. Goharshady, R. Ibsen-Jensen, Y. Velner, in:, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2018.","ista":"Chatterjee K, Goharshady AK, Ibsen-Jensen R, Velner Y. 2018. Ergodic mean-payoff games for the analysis of attacks in crypto-currencies. CONCUR: Conference on Concurrency Theory, LIPIcs, vol. 118, 11."},"intvolume":"       118","date_created":"2018-12-11T11:44:27Z","status":"public","year":"2018","oa":1,"publication_identifier":{"isbn":["978-3-95977-087-3"]},"abstract":[{"text":"Crypto-currencies are digital assets designed to work as a medium of exchange, e.g., Bitcoin, but they are susceptible to attacks (dishonest behavior of participants). A framework for the analysis of attacks in crypto-currencies requires (a) modeling of game-theoretic aspects to analyze incentives for deviation from honest behavior; (b) concurrent interactions between participants; and (c) analysis of long-term monetary gains. Traditional game-theoretic approaches for the analysis of security protocols consider either qualitative temporal properties such as safety and termination, or the very special class of one-shot (stateless) games. However, to analyze general attacks on protocols for crypto-currencies, both stateful analysis and quantitative objectives are necessary. In this work our main contributions are as follows: (a) we show how a class of concurrent mean-payo games, namely ergodic games, can model various attacks that arise naturally in crypto-currencies; (b) we present the first practical implementation of algorithms for ergodic games that scales to model realistic problems for crypto-currencies; and (c) we present experimental results showing that our framework can handle games with thousands of states and millions of transitions.","lang":"eng"}],"alternative_title":["LIPIcs"],"author":[{"first_name":"Krishnendu","full_name":"Chatterjee, Krishnendu","last_name":"Chatterjee","orcid":"0000-0002-4561-241X","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Amir","full_name":"Goharshady, Amir","last_name":"Goharshady","orcid":"0000-0003-1702-6584","id":"391365CE-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Ibsen-Jensen","id":"3B699956-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-4783-0389","first_name":"Rasmus","full_name":"Ibsen-Jensen, Rasmus"},{"last_name":"Velner","first_name":"Yaron","full_name":"Velner, Yaron"}],"date_published":"2018-09-01T00:00:00Z","ddc":["000"],"title":"Ergodic mean-payoff games for the analysis of attacks in crypto-currencies","external_id":{"arxiv":["1806.03108"]},"ec_funded":1,"language":[{"iso":"eng"}],"file":[{"access_level":"open_access","file_size":1078309,"date_created":"2018-12-17T12:08:00Z","checksum":"68a055b1aaa241cc38375083cf832a7d","file_id":"5696","content_type":"application/pdf","creator":"dernst","relation":"main_file","file_name":"2018_CONCUR_Chatterjee.pdf","date_updated":"2020-07-14T12:47:34Z"}],"file_date_updated":"2020-07-14T12:47:34Z","article_number":"11","has_accepted_license":"1","conference":{"end_date":"2018-09-07","name":"CONCUR: Conference on Concurrency Theory","start_date":"2018-09-04","location":"Beijing, China"},"arxiv":1},{"conference":{"end_date":"2018-04-19","location":"Thessaloniki, Greece","start_date":"2018-04-16","name":"ESOP: European Symposium on Programming"},"has_accepted_license":"1","language":[{"iso":"eng"}],"file":[{"date_created":"2018-12-17T15:45:49Z","file_size":1394993,"access_level":"open_access","checksum":"9c8a8338c571903b599b6ca93abd2cce","file_id":"5716","creator":"dernst","content_type":"application/pdf","relation":"main_file","file_name":"2018_ESOP_Chatterjee.pdf","date_updated":"2020-07-14T12:46:00Z"}],"file_date_updated":"2020-07-14T12:46:00Z","acknowledgement":"The research was partially supported by Vienna Science and Technology Fund (WWTF) Project ICT15-003, Austrian Science Fund (FWF) NFN Grant No S11407-N23 (RiSE/SHiNE), and ERC Starting grant (279307: Graph Games).","title":"Quantitative analysis of smart contracts","ec_funded":1,"oa":1,"page":"739 - 767","abstract":[{"lang":"eng","text":"Smart contracts are computer programs that are executed by a network of mutually distrusting agents, without the need of an external trusted authority. Smart contracts handle and transfer assets of considerable value (in the form of crypto-currency like Bitcoin). Hence, it is crucial that their implementation is bug-free. We identify the utility (or expected payoff) of interacting with such smart contracts as the basic and canonical quantitative property for such contracts. We present a framework for such quantitative analysis of smart contracts. Such a formal framework poses new and novel research challenges in programming languages, as it requires modeling of game-theoretic aspects to analyze incentives for deviation from honest behavior and modeling utilities which are not specified as standard temporal properties such as safety and termination. While game-theoretic incentives have been analyzed in the security community, their analysis has been restricted to the very special case of stateless games. However, to analyze smart contracts, stateful analysis is required as it must account for the different program states of the protocol. Our main contributions are as follows: we present (i)~a simplified programming language for smart contracts; (ii)~an automatic translation of the programs to state-based games; (iii)~an abstraction-refinement approach to solve such games; and (iv)~experimental results on real-world-inspired smart contracts."}],"date_published":"2018-04-01T00:00:00Z","alternative_title":["LNCS"],"author":[{"last_name":"Chatterjee","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4561-241X","first_name":"Krishnendu","full_name":"Chatterjee, Krishnendu"},{"last_name":"Goharshady","orcid":"0000-0003-1702-6584","id":"391365CE-F248-11E8-B48F-1D18A9856A87","first_name":"Amir","full_name":"Goharshady, Amir"},{"last_name":"Velner","first_name":"Yaron","full_name":"Velner, Yaron"}],"ddc":["000"],"doi":"10.1007/978-3-319-89884-1_26","related_material":{"record":[{"relation":"dissertation_contains","id":"8934","status":"public"}]},"citation":{"apa":"Chatterjee, K., Goharshady, A. K., &#38; Velner, Y. (2018). Quantitative analysis of smart contracts (Vol. 10801, pp. 739–767). Presented at the ESOP: European Symposium on Programming, Thessaloniki, Greece: Springer. <a href=\"https://doi.org/10.1007/978-3-319-89884-1_26\">https://doi.org/10.1007/978-3-319-89884-1_26</a>","chicago":"Chatterjee, Krishnendu, Amir Kafshdar Goharshady, and Yaron Velner. “Quantitative Analysis of Smart Contracts,” 10801:739–67. Springer, 2018. <a href=\"https://doi.org/10.1007/978-3-319-89884-1_26\">https://doi.org/10.1007/978-3-319-89884-1_26</a>.","mla":"Chatterjee, Krishnendu, et al. <i>Quantitative Analysis of Smart Contracts</i>. Vol. 10801, Springer, 2018, pp. 739–67, doi:<a href=\"https://doi.org/10.1007/978-3-319-89884-1_26\">10.1007/978-3-319-89884-1_26</a>.","ieee":"K. Chatterjee, A. K. Goharshady, and Y. Velner, “Quantitative analysis of smart contracts,” presented at the ESOP: European Symposium on Programming, Thessaloniki, Greece, 2018, vol. 10801, pp. 739–767.","ama":"Chatterjee K, Goharshady AK, Velner Y. Quantitative analysis of smart contracts. In: Vol 10801. Springer; 2018:739-767. doi:<a href=\"https://doi.org/10.1007/978-3-319-89884-1_26\">10.1007/978-3-319-89884-1_26</a>","ista":"Chatterjee K, Goharshady AK, Velner Y. 2018. Quantitative analysis of smart contracts. ESOP: European Symposium on Programming, LNCS, vol. 10801, 739–767.","short":"K. Chatterjee, A.K. Goharshady, Y. Velner, in:, Springer, 2018, pp. 739–767."},"intvolume":"     10801","date_created":"2018-12-11T11:45:45Z","status":"public","year":"2018","scopus_import":"1","project":[{"name":"Efficient Algorithms for Computer Aided Verification","_id":"25892FC0-B435-11E9-9278-68D0E5697425","grant_number":"ICT15-003"},{"_id":"25832EC2-B435-11E9-9278-68D0E5697425","name":"Rigorous Systems Engineering","call_identifier":"FWF","grant_number":"S 11407_N23"},{"call_identifier":"FP7","grant_number":"279307","_id":"2581B60A-B435-11E9-9278-68D0E5697425","name":"Quantitative Graph Games: Theory and Applications"}],"type":"conference","day":"01","volume":10801,"quality_controlled":"1","department":[{"_id":"KrCh"}],"month":"04","publist_id":"7554","date_updated":"2026-06-09T22:31:07Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Published Version","_id":"311","publication_status":"published","article_processing_charge":"No","publisher":"Springer","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"}},{"file_date_updated":"2020-07-14T12:47:27Z","language":[{"iso":"eng"}],"file":[{"file_id":"6341","content_type":"application/pdf","creator":"akafshda","file_name":"blockchain2018.pdf","relation":"main_file","date_updated":"2020-07-14T12:47:27Z","access_level":"open_access","file_size":624338,"date_created":"2019-04-18T10:36:39Z","checksum":"b25c9bb7cf6e7e6634e692d26d41ead8"}],"conference":{"end_date":"2018-08-03","name":"IEEE International Conference on Blockchain","location":"Halifax, Canada","start_date":"2018-07-30"},"has_accepted_license":"1","arxiv":1,"page":"1343-1348","abstract":[{"lang":"eng","text":"We  present  a  secure  approach  for  maintaining  andreporting  credit  history  records  on  the  Blockchain.  Our  ap-proach  removes  third-parties  such  as  credit  reporting  agen-cies  from  the  lending  process  and  replaces  them  with  smartcontracts.  This  allows  customers  to  interact  directly  with  thelenders  or  banks  while  ensuring  the  integrity,  unmalleabilityand  privacy  of  their  credit  data.  Additionally,  each  customerhas  full  control  over  complete  or  selective  disclosure  of  hercredit records, eliminating the risk of privacy violations or databreaches. Moreover, our approach provides strong guaranteesfor the lenders as well. A lender can check both correctness andcompleteness of the credit data disclosed to her. This is the firstapproach  that  can  perform  all  credit  reporting  tasks  withouta  central  authority  or  changing  the  financial  mechanisms*."}],"date_published":"2018-09-01T00:00:00Z","author":[{"full_name":"Goharshady, Amir Kafshdar","first_name":"Amir Kafshdar","orcid":"0000-0003-1702-6584","id":"391365CE-F248-11E8-B48F-1D18A9856A87","last_name":"Goharshady"},{"last_name":"Behrouz","full_name":"Behrouz, Ali","first_name":"Ali"},{"full_name":"Chatterjee, Krishnendu","first_name":"Krishnendu","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4561-241X","last_name":"Chatterjee"}],"ddc":["000"],"oa":1,"publication_identifier":{"isbn":["978-1-5386-7975-3 "]},"ec_funded":1,"publication":"Proceedings of the IEEE International Conference on Blockchain","title":"Secure Credit Reporting on the Blockchain","external_id":{"isi":["000481634500196"],"arxiv":["1805.09104"]},"day":"01","scopus_import":"1","project":[{"grant_number":"ICT15-003","_id":"25892FC0-B435-11E9-9278-68D0E5697425","name":"Efficient Algorithms for Computer Aided Verification"},{"name":"Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts","_id":"266EEEC0-B435-11E9-9278-68D0E5697425"},{"name":"Quantitative Graph Games: Theory and Applications","_id":"2581B60A-B435-11E9-9278-68D0E5697425","grant_number":"279307","call_identifier":"FP7"},{"grant_number":"S 11407_N23","call_identifier":"FWF","name":"Rigorous Systems Engineering","_id":"25832EC2-B435-11E9-9278-68D0E5697425"}],"type":"conference","citation":{"chicago":"Goharshady, Amir Kafshdar, Ali Behrouz, and Krishnendu Chatterjee. “Secure Credit Reporting on the Blockchain.” In <i>Proceedings of the IEEE International Conference on Blockchain</i>, 1343–48. IEEE, 2018. <a href=\"https://doi.org/10.1109/Cybermatics_2018.2018.00231\">https://doi.org/10.1109/Cybermatics_2018.2018.00231</a>.","mla":"Goharshady, Amir Kafshdar, et al. “Secure Credit Reporting on the Blockchain.” <i>Proceedings of the IEEE International Conference on Blockchain</i>, IEEE, 2018, pp. 1343–48, doi:<a href=\"https://doi.org/10.1109/Cybermatics_2018.2018.00231\">10.1109/Cybermatics_2018.2018.00231</a>.","apa":"Goharshady, A. K., Behrouz, A., &#38; Chatterjee, K. (2018). Secure Credit Reporting on the Blockchain. In <i>Proceedings of the IEEE International Conference on Blockchain</i> (pp. 1343–1348). Halifax, Canada: IEEE. <a href=\"https://doi.org/10.1109/Cybermatics_2018.2018.00231\">https://doi.org/10.1109/Cybermatics_2018.2018.00231</a>","ista":"Goharshady AK, Behrouz A, Chatterjee K. 2018. Secure Credit Reporting on the Blockchain. Proceedings of the IEEE International Conference on Blockchain. IEEE International Conference on Blockchain, 1343–1348.","short":"A.K. Goharshady, A. Behrouz, K. Chatterjee, in:, Proceedings of the IEEE International Conference on Blockchain, IEEE, 2018, pp. 1343–1348.","ama":"Goharshady AK, Behrouz A, Chatterjee K. Secure Credit Reporting on the Blockchain. In: <i>Proceedings of the IEEE International Conference on Blockchain</i>. IEEE; 2018:1343-1348. doi:<a href=\"https://doi.org/10.1109/Cybermatics_2018.2018.00231\">10.1109/Cybermatics_2018.2018.00231</a>","ieee":"A. K. Goharshady, A. Behrouz, and K. Chatterjee, “Secure Credit Reporting on the Blockchain,” in <i>Proceedings of the IEEE International Conference on Blockchain</i>, Halifax, Canada, 2018, pp. 1343–1348."},"date_created":"2019-04-18T10:37:35Z","status":"public","year":"2018","doi":"10.1109/Cybermatics_2018.2018.00231","related_material":{"record":[{"status":"public","id":"8934","relation":"dissertation_contains"}]},"publication_status":"published","article_processing_charge":"No","publisher":"IEEE","tmp":{"short":"CC BY-NC-ND (4.0)","image":"/images/cc_by_nc_nd.png","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)"},"isi":1,"date_updated":"2026-06-09T22:31:07Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","oa_version":"Submitted Version","license":"https://creativecommons.org/licenses/by-nc-nd/4.0/","_id":"6340","department":[{"_id":"KrCh"}],"month":"09","quality_controlled":"1"},{"volume":40,"day":"01","type":"journal_article","project":[{"grant_number":"P 23499-N23","call_identifier":"FWF","name":"Modern Graph Algorithmic Techniques in Formal Verification","_id":"2584A770-B435-11E9-9278-68D0E5697425"},{"call_identifier":"FWF","grant_number":"S 11407_N23","_id":"25832EC2-B435-11E9-9278-68D0E5697425","name":"Rigorous Systems Engineering"},{"_id":"2581B60A-B435-11E9-9278-68D0E5697425","name":"Quantitative Graph Games: Theory and Applications","call_identifier":"FP7","grant_number":"279307"}],"scopus_import":"1","year":"2018","corr_author":"1","status":"public","date_created":"2019-02-14T14:31:52Z","intvolume":"        40","citation":{"chicago":"Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, Amir Kafshdar Goharshady, and Andreas Pavlogiannis. “Algorithms for Algebraic Path Properties in Concurrent Systems of Constant Treewidth Components.” <i>ACM Transactions on Programming Languages and Systems</i>. Association for Computing Machinery, 2018. <a href=\"https://doi.org/10.1145/3210257\">https://doi.org/10.1145/3210257</a>.","mla":"Chatterjee, Krishnendu, et al. “Algorithms for Algebraic Path Properties in Concurrent Systems of Constant Treewidth Components.” <i>ACM Transactions on Programming Languages and Systems</i>, vol. 40, no. 3, 9, Association for Computing Machinery, 2018, doi:<a href=\"https://doi.org/10.1145/3210257\">10.1145/3210257</a>.","apa":"Chatterjee, K., Ibsen-Jensen, R., Goharshady, A. K., &#38; Pavlogiannis, A. (2018). Algorithms for algebraic path properties in concurrent systems of constant treewidth components. <i>ACM Transactions on Programming Languages and Systems</i>. Association for Computing Machinery. <a href=\"https://doi.org/10.1145/3210257\">https://doi.org/10.1145/3210257</a>","ista":"Chatterjee K, Ibsen-Jensen R, Goharshady AK, Pavlogiannis A. 2018. Algorithms for algebraic path properties in concurrent systems of constant treewidth components. ACM Transactions on Programming Languages and Systems. 40(3), 9.","short":"K. Chatterjee, R. Ibsen-Jensen, A.K. Goharshady, A. Pavlogiannis, ACM Transactions on Programming Languages and Systems 40 (2018).","ieee":"K. Chatterjee, R. Ibsen-Jensen, A. K. Goharshady, and A. Pavlogiannis, “Algorithms for algebraic path properties in concurrent systems of constant treewidth components,” <i>ACM Transactions on Programming Languages and Systems</i>, vol. 40, no. 3. Association for Computing Machinery, 2018.","ama":"Chatterjee K, Ibsen-Jensen R, Goharshady AK, Pavlogiannis A. Algorithms for algebraic path properties in concurrent systems of constant treewidth components. <i>ACM Transactions on Programming Languages and Systems</i>. 2018;40(3). doi:<a href=\"https://doi.org/10.1145/3210257\">10.1145/3210257</a>"},"related_material":{"record":[{"relation":"earlier_version","status":"public","id":"5441"},{"id":"5442","status":"public","relation":"earlier_version"},{"id":"1437","status":"public","relation":"earlier_version"},{"relation":"dissertation_contains","status":"public","id":"8934"}]},"doi":"10.1145/3210257","isi":1,"publisher":"Association for Computing Machinery","publication_status":"published","article_processing_charge":"No","_id":"6009","oa_version":"Preprint","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2026-06-09T22:31:07Z","month":"08","department":[{"_id":"KrCh"}],"quality_controlled":"1","main_file_link":[{"url":"https://arxiv.org/abs/1510.07565","open_access":"1"}],"article_number":"9","language":[{"iso":"eng"}],"issue":"3","arxiv":1,"date_published":"2018-08-01T00:00:00Z","author":[{"last_name":"Chatterjee","orcid":"0000-0002-4561-241X","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","first_name":"Krishnendu","full_name":"Chatterjee, Krishnendu"},{"full_name":"Ibsen-Jensen, Rasmus","first_name":"Rasmus","id":"3B699956-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-4783-0389","last_name":"Ibsen-Jensen"},{"full_name":"Goharshady, Amir Kafshdar","first_name":"Amir Kafshdar","id":"391365CE-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-1702-6584","last_name":"Goharshady"},{"id":"49704004-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-8943-0722","last_name":"Pavlogiannis","full_name":"Pavlogiannis, Andreas","first_name":"Andreas"}],"abstract":[{"text":"We study algorithmic questions wrt algebraic path properties in concurrent systems, where the transitions of the system are labeled from a complete, closed semiring. The algebraic path properties can model dataflow analysis problems, the shortest path problem, and many other natural problems that arise in program analysis. We consider that each component of the concurrent system is a graph with constant treewidth, a property satisfied by the controlflow graphs of most programs. We allow for multiple possible queries, which arise naturally in demand driven dataflow analysis. The study of multiple queries allows us to consider the tradeoff between the resource usage of the one-time preprocessing and for each individual query. The traditional approach constructs the product graph of all components and applies the best-known graph algorithm on the product. In this approach, even the answer to a single query requires the transitive closure (i.e., the results of all possible queries), which provides no room for tradeoff between preprocessing and query time.\r\nOur main contributions are algorithms that significantly improve the worst-case running time of the traditional approach, and provide various tradeoffs depending on the number of queries. For example, in a concurrent system of two components, the traditional approach requires hexic time in the worst case for answering one query as well as computing the transitive closure, whereas we show that with one-time preprocessing in almost cubic time, each subsequent query can be answered in at most linear time, and even the transitive closure can be computed in almost quartic time. Furthermore, we establish conditional optimality results showing that the worst-case running time of our algorithms cannot be improved without achieving major breakthroughs in graph algorithms (i.e., improving the worst-case bound for the shortest path problem in general graphs). Preliminary experimental results show that our algorithms perform favorably on several benchmarks.\r\n","lang":"eng"}],"publication_identifier":{"issn":["0164-0925"]},"oa":1,"publication":"ACM Transactions on Programming Languages and Systems","ec_funded":1,"external_id":{"isi":["000444694800001"],"arxiv":["1510.07565"]},"title":"Algorithms for algebraic path properties in concurrent systems of constant treewidth components"},{"doi":"10.24963/ijcai.2018/653","related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"8934"}]},"date_created":"2019-02-13T13:26:27Z","citation":{"ama":"Chatterjee K, Fu H, Goharshady AK, Okati N. Computational approaches for stochastic shortest path on succinct MDPs. In: <i>Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence</i>. Vol 2018. IJCAI; 2018:4700-4707. doi:<a href=\"https://doi.org/10.24963/ijcai.2018/653\">10.24963/ijcai.2018/653</a>","ieee":"K. Chatterjee, H. Fu, A. K. Goharshady, and N. Okati, “Computational approaches for stochastic shortest path on succinct MDPs,” in <i>Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence</i>, Stockholm, Sweden, 2018, vol. 2018, pp. 4700–4707.","ista":"Chatterjee K, Fu H, Goharshady AK, Okati N. 2018. Computational approaches for stochastic shortest path on succinct MDPs. Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence. IJCAI: International Joint Conference on Artificial Intelligence vol. 2018, 4700–4707.","short":"K. Chatterjee, H. Fu, A.K. Goharshady, N. Okati, in:, Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence, IJCAI, 2018, pp. 4700–4707.","apa":"Chatterjee, K., Fu, H., Goharshady, A. K., &#38; Okati, N. (2018). Computational approaches for stochastic shortest path on succinct MDPs. In <i>Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence</i> (Vol. 2018, pp. 4700–4707). Stockholm, Sweden: IJCAI. <a href=\"https://doi.org/10.24963/ijcai.2018/653\">https://doi.org/10.24963/ijcai.2018/653</a>","chicago":"Chatterjee, Krishnendu, Hongfei Fu, Amir Kafshdar Goharshady, and Nastaran Okati. “Computational Approaches for Stochastic Shortest Path on Succinct MDPs.” In <i>Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence</i>, 2018:4700–4707. IJCAI, 2018. <a href=\"https://doi.org/10.24963/ijcai.2018/653\">https://doi.org/10.24963/ijcai.2018/653</a>.","mla":"Chatterjee, Krishnendu, et al. “Computational Approaches for Stochastic Shortest Path on Succinct MDPs.” <i>Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence</i>, vol. 2018, IJCAI, 2018, pp. 4700–07, doi:<a href=\"https://doi.org/10.24963/ijcai.2018/653\">10.24963/ijcai.2018/653</a>."},"intvolume":"      2018","year":"2018","status":"public","scopus_import":"1","type":"conference","project":[{"_id":"25892FC0-B435-11E9-9278-68D0E5697425","name":"Efficient Algorithms for Computer Aided Verification","grant_number":"ICT15-003"},{"call_identifier":"FWF","grant_number":"S 11407_N23","_id":"25832EC2-B435-11E9-9278-68D0E5697425","name":"Rigorous Systems Engineering"},{"_id":"2581B60A-B435-11E9-9278-68D0E5697425","name":"Quantitative Graph Games: Theory and Applications","call_identifier":"FP7","grant_number":"279307"}],"day":"17","volume":2018,"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1804.08984"}],"quality_controlled":"1","department":[{"_id":"KrCh"}],"month":"07","oa_version":"Preprint","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2026-06-09T22:31:08Z","_id":"5977","article_processing_charge":"No","publication_status":"published","isi":1,"publisher":"IJCAI","conference":{"end_date":"2018-07-19","name":"IJCAI: International Joint Conference on Artificial Intelligence","start_date":"2018-07-13","location":"Stockholm, Sweden"},"arxiv":1,"language":[{"iso":"eng"}],"title":"Computational approaches for stochastic shortest path on succinct MDPs","external_id":{"arxiv":["1804.08984"],"isi":["000764175404118"]},"ec_funded":1,"publication":"Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence","oa":1,"publication_identifier":{"issn":["1045-0823"],"isbn":["9780999241127"]},"date_published":"2018-07-17T00:00:00Z","author":[{"id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4561-241X","last_name":"Chatterjee","full_name":"Chatterjee, Krishnendu","first_name":"Krishnendu"},{"full_name":"Fu, Hongfei","first_name":"Hongfei","id":"3AAD03D6-F248-11E8-B48F-1D18A9856A87","last_name":"Fu"},{"full_name":"Goharshady, Amir","first_name":"Amir","orcid":"0000-0003-1702-6584","id":"391365CE-F248-11E8-B48F-1D18A9856A87","last_name":"Goharshady"},{"last_name":"Okati","first_name":"Nastaran","full_name":"Okati, Nastaran"}],"abstract":[{"text":"We consider the stochastic shortest path (SSP)problem for succinct Markov decision processes(MDPs), where the MDP consists of a set of vari-ables, and a set of nondeterministic rules that up-date the variables. First, we show that several ex-amples from the AI literature can be modeled assuccinct MDPs.  Then we present computationalapproaches for upper and lower bounds for theSSP problem: (a) for computing upper bounds, ourmethod is polynomial-time in the implicit descrip-tion of the MDP; (b) for lower bounds, we present apolynomial-time (in the size of the implicit descrip-tion) reduction to quadratic programming. Our ap-proach is applicable even to infinite-state MDPs.Finally, we present experimental results to demon-strate the effectiveness of our approach on severalclassical examples from the AI literature.","lang":"eng"}],"page":"4700-4707"},{"publist_id":"7381","month":"01","department":[{"_id":"JiFr"},{"_id":"Bio"}],"quality_controlled":"1","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"publisher":"Bio-protocol","article_processing_charge":"No","publication_status":"published","_id":"442","oa_version":"Published Version","pubrep_id":"970","date_updated":"2026-06-09T22:31:09Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","year":"2018","article_type":"original","corr_author":"1","status":"public","date_created":"2018-12-11T11:46:30Z","intvolume":"         8","citation":{"apa":"Li, L., Krens, G., Fendrych, M., &#38; Friml, J. (2018). Real-time analysis of auxin response, cell wall pH and elongation in Arabidopsis thaliana Hypocotyls. <i>Bio-Protocol</i>. Bio-protocol. <a href=\"https://doi.org/10.21769/BioProtoc.2685\">https://doi.org/10.21769/BioProtoc.2685</a>","mla":"Li, Lanxin, et al. “Real-Time Analysis of Auxin Response, Cell Wall PH and Elongation in Arabidopsis Thaliana Hypocotyls.” <i>Bio-Protocol</i>, vol. 8, no. 1, Bio-protocol, 2018, doi:<a href=\"https://doi.org/10.21769/BioProtoc.2685\">10.21769/BioProtoc.2685</a>.","chicago":"Li, Lanxin, Gabriel Krens, Matyas Fendrych, and Jiří Friml. “Real-Time Analysis of Auxin Response, Cell Wall PH and Elongation in Arabidopsis Thaliana Hypocotyls.” <i>Bio-Protocol</i>. Bio-protocol, 2018. <a href=\"https://doi.org/10.21769/BioProtoc.2685\">https://doi.org/10.21769/BioProtoc.2685</a>.","ama":"Li L, Krens G, Fendrych M, Friml J. Real-time analysis of auxin response, cell wall pH and elongation in Arabidopsis thaliana Hypocotyls. <i>Bio-protocol</i>. 2018;8(1). doi:<a href=\"https://doi.org/10.21769/BioProtoc.2685\">10.21769/BioProtoc.2685</a>","ieee":"L. Li, G. Krens, M. Fendrych, and J. Friml, “Real-time analysis of auxin response, cell wall pH and elongation in Arabidopsis thaliana Hypocotyls,” <i>Bio-protocol</i>, vol. 8, no. 1. Bio-protocol, 2018.","ista":"Li L, Krens G, Fendrych M, Friml J. 2018. Real-time analysis of auxin response, cell wall pH and elongation in Arabidopsis thaliana Hypocotyls. Bio-protocol. 8(1).","short":"L. Li, G. Krens, M. Fendrych, J. Friml, Bio-Protocol 8 (2018)."},"related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"10083"}]},"doi":"10.21769/BioProtoc.2685","volume":8,"day":"05","type":"journal_article","project":[{"name":"International IST Doctoral Program","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","grant_number":"665385","call_identifier":"H2020"}],"publication":"Bio-protocol","ec_funded":1,"title":"Real-time analysis of auxin response, cell wall pH and elongation in Arabidopsis thaliana Hypocotyls","ddc":["576","581"],"date_published":"2018-01-05T00:00:00Z","author":[{"full_name":"Li, Lanxin","first_name":"Lanxin","id":"367EF8FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-5607-272X","last_name":"Li"},{"full_name":"Krens, Gabriel","first_name":"Gabriel","id":"2B819732-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-4761-5996","last_name":"Krens"},{"last_name":"Fendrych","id":"43905548-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-9767-8699","first_name":"Matyas","full_name":"Fendrych, Matyas"},{"first_name":"Jirí","full_name":"Friml, Jirí","last_name":"Friml","orcid":"0000-0002-8302-7596","id":"4159519E-F248-11E8-B48F-1D18A9856A87"}],"abstract":[{"text":"The rapid auxin-triggered growth of the Arabidopsis hypocotyls involves the nuclear TIR1/AFB-Aux/IAA signaling and is accompanied by acidification of the apoplast and cell walls (Fendrych et al., 2016). Here, we describe in detail the method for analysis of the elongation and the TIR1/AFB-Aux/IAA-dependent auxin response in hypocotyl segments as well as the determination of relative values of the cell wall pH.","lang":"eng"}],"publication_identifier":{"eissn":["2331-8325"]},"oa":1,"issue":"1","has_accepted_license":"1","acknowledgement":"This protocol was adapted from Fendrych et al., 2016. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 665385, and Austrian Science Fund (FWF) [M 2128-B21]. ","file_date_updated":"2020-07-14T12:46:29Z","file":[{"content_type":"application/pdf","creator":"system","file_id":"5299","date_updated":"2020-07-14T12:46:29Z","file_name":"IST-2018-970-v1+1_2018_Lanxin_Real-time_analysis.pdf","relation":"main_file","access_level":"open_access","file_size":11352389,"date_created":"2018-12-12T10:17:43Z","checksum":"6644ba698206eda32b0abf09128e63e3"}],"language":[{"iso":"eng"}]},{"issue":"4","language":[{"iso":"eng"}],"acknowledgement":"We thank all the participants for their contribution to this study and volunteers from the Nursing School of Dalian University for their supporting to collect blood and urine samples of the participants. We also thank Dr. Yasunori Takayama from National Institute for Physiological Sciences of Japan for his kind help.","title":"Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels","external_id":{"isi":["000404315200029"]},"publication":"Clinical Nutrition","publication_identifier":{"issn":["0261-5614"]},"author":[{"last_name":"Sun","full_name":"Sun, Wuping","first_name":"Wuping"},{"full_name":"Zhai, Ming-Zhu","first_name":"Ming-Zhu","id":"34009CFA-F248-11E8-B48F-1D18A9856A87","last_name":"Zhai"},{"last_name":"Li","full_name":"Li, Da","first_name":"Da"},{"last_name":"Zhou","first_name":"Yiming","full_name":"Zhou, Yiming"},{"last_name":"Chen","first_name":"Nana","full_name":"Chen, Nana"},{"last_name":"Guo","first_name":"Ming","full_name":"Guo, Ming"},{"first_name":"Shisheng","full_name":"Zhou, Shisheng","last_name":"Zhou"}],"date_published":"2017-08-01T00:00:00Z","abstract":[{"text":"Aim: The present study was to compare the effects of nicotinic acid and nicotinamide on the plasma methyl donors, choline and betaine. Methods: Thirty adult subjects were randomly divided into three groups of equal size, and orally received purified water (C group), nicotinic acid (300 mg, NA group) or nicotinamide (300 mg, NM group). Plasma nicotinamide, N 1-methylnicotinamide, homocysteine, betaine and choline levels before and 1.5-h and 3-h post-dosing, plasma normetanephrine and metanephrine concentrations at 3-h post-dosing, and the urinary excretion of N 1-methyl-2-pyridone-5-carboxamide during the test period were examined. Results: The level of 3-h plasma nicotinamide, N 1-methylnicotinamide, homocysteine, the urinary excretion of N 1-methyl-2-pyridone-5-carboxamide and pulse pressure (PP) in the NM group was 221%, 3972%, 61%, 1728% and 21.2% higher than that of the control group (P &lt; 0.01, except homocysteine and PP P &lt; 0.05), while the 3-h plasma betaine, normetanephrine and metanephrine level in the NM group was 24.4%, 9.4% and 11.7% lower (P &lt; 0.05, except betaine P &lt; 0.01), without significant difference in choline levels. Similar but less pronounced changes were observed in the NA group, with a lower level of 3-h plasma N 1-methylnicotinamide (1.90 ± 0.20 μmol/l vs. 3.62 ± 0.27 μmol/l, P &lt; 0.01) and homocysteine (12.85 ± 1.39 μmol/l vs. 18.08 ± 1.02 μmol/l, P &lt; 0.05) but a higher level of betaine (27.44 ± 0.71 μmol/l vs. 23.52 ± 0.61 μmol/l, P &lt; 0.05) than that of the NM group. Conclusion: The degradation of nicotinamide consumes more betaine than that of nicotinic acid at identical doses. This difference should be taken into consideration in niacin fortification. © 2016 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism.","lang":"eng"}],"page":"1136-1142","doi":"10.1016/j.clnu.2016.07.016","date_created":"2018-12-11T11:50:24Z","citation":{"apa":"Sun, W., Zhai, M.-Z., Li, D., Zhou, Y., Chen, N., Guo, M., &#38; Zhou, S. (2017). Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels. <i>Clinical Nutrition</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.clnu.2016.07.016\">https://doi.org/10.1016/j.clnu.2016.07.016</a>","chicago":"Sun, Wuping, Ming-Zhu Zhai, Da Li, Yiming Zhou, Nana Chen, Ming Guo, and Shisheng Zhou. “Comparison of the Effects of Nicotinic Acid and Nicotinamide Degradation on Plasma Betaine and Choline Levels.” <i>Clinical Nutrition</i>. Elsevier, 2017. <a href=\"https://doi.org/10.1016/j.clnu.2016.07.016\">https://doi.org/10.1016/j.clnu.2016.07.016</a>.","mla":"Sun, Wuping, et al. “Comparison of the Effects of Nicotinic Acid and Nicotinamide Degradation on Plasma Betaine and Choline Levels.” <i>Clinical Nutrition</i>, vol. 36, no. 4, Elsevier, 2017, pp. 1136–42, doi:<a href=\"https://doi.org/10.1016/j.clnu.2016.07.016\">10.1016/j.clnu.2016.07.016</a>.","ieee":"W. Sun <i>et al.</i>, “Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels,” <i>Clinical Nutrition</i>, vol. 36, no. 4. Elsevier, pp. 1136–1142, 2017.","ama":"Sun W, Zhai M-Z, Li D, et al. Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels. <i>Clinical Nutrition</i>. 2017;36(4):1136-1142. doi:<a href=\"https://doi.org/10.1016/j.clnu.2016.07.016\">10.1016/j.clnu.2016.07.016</a>","short":"W. Sun, M.-Z. Zhai, D. Li, Y. Zhou, N. Chen, M. Guo, S. Zhou, Clinical Nutrition 36 (2017) 1136–1142.","ista":"Sun W, Zhai M-Z, Li D, Zhou Y, Chen N, Guo M, Zhou S. 2017. Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels. Clinical Nutrition. 36(4), 1136–1142."},"intvolume":"        36","year":"2017","status":"public","scopus_import":"1","type":"journal_article","day":"01","volume":36,"quality_controlled":"1","department":[{"_id":"RySh"}],"publist_id":"6212","month":"08","oa_version":"None","date_updated":"2025-09-22T09:59:49Z","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","_id":"1146","article_processing_charge":"No","publication_status":"published","publisher":"Elsevier","isi":1},{"volume":851,"day":"21","type":"journal_article","scopus_import":"1","article_type":"original","year":"2017","status":"public","date_created":"2022-07-07T08:48:04Z","citation":{"ama":"Matthee JJ, Sobral D, Boone F, et al. ALMA reveals metals yet no dust within multiple components in CR7. <i>The Astrophysical Journal</i>. 2017;851(2). doi:<a href=\"https://doi.org/10.3847/1538-4357/aa9931\">10.3847/1538-4357/aa9931</a>","ieee":"J. J. Matthee <i>et al.</i>, “ALMA reveals metals yet no dust within multiple components in CR7,” <i>The Astrophysical Journal</i>, vol. 851, no. 2. IOP Publishing, 2017.","short":"J.J. Matthee, D. Sobral, F. Boone, H. Röttgering, D. Schaerer, M. Girard, A. Pallottini, L. Vallini, A. Ferrara, B. Darvish, B. Mobasher, The Astrophysical Journal 851 (2017).","ista":"Matthee JJ, Sobral D, Boone F, Röttgering H, Schaerer D, Girard M, Pallottini A, Vallini L, Ferrara A, Darvish B, Mobasher B. 2017. ALMA reveals metals yet no dust within multiple components in CR7. The Astrophysical Journal. 851(2), 145.","apa":"Matthee, J. J., Sobral, D., Boone, F., Röttgering, H., Schaerer, D., Girard, M., … Mobasher, B. (2017). ALMA reveals metals yet no dust within multiple components in CR7. <i>The Astrophysical Journal</i>. IOP Publishing. <a href=\"https://doi.org/10.3847/1538-4357/aa9931\">https://doi.org/10.3847/1538-4357/aa9931</a>","mla":"Matthee, Jorryt J., et al. “ALMA Reveals Metals yet No Dust within Multiple Components in CR7.” <i>The Astrophysical Journal</i>, vol. 851, no. 2, 145, IOP Publishing, 2017, doi:<a href=\"https://doi.org/10.3847/1538-4357/aa9931\">10.3847/1538-4357/aa9931</a>.","chicago":"Matthee, Jorryt J, D. Sobral, F. Boone, H. Röttgering, D. Schaerer, M. Girard, A. Pallottini, et al. “ALMA Reveals Metals yet No Dust within Multiple Components in CR7.” <i>The Astrophysical Journal</i>. IOP Publishing, 2017. <a href=\"https://doi.org/10.3847/1538-4357/aa9931\">https://doi.org/10.3847/1538-4357/aa9931</a>."},"intvolume":"       851","doi":"10.3847/1538-4357/aa9931","publisher":"IOP Publishing","article_processing_charge":"No","publication_status":"published","_id":"11518","oa_version":"Preprint","date_updated":"2024-10-14T11:32:14Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"12","quality_controlled":"1","main_file_link":[{"url":"https://arxiv.org/abs/1709.06569","open_access":"1"}],"article_number":"145","acknowledgement":"We thank the referee for their constructive comments, which have helped improve the quality and clarity of this work. We thank Raffaella Schneider for comments on an earlier version of this paper. We thank Leindert Boogaard, Steven Bos, Rychard Bouwens, and Renske Smit for discussions. J.M. acknowledges the support of a Huygens PhD fellowship from Leiden University. D.S. acknowledges financial support from the Netherlands Organisation for Scientific research (NWO) through a Veni fellowship and from Lancaster University through an Early Career Internal Grant A100679. A.F. acknowledges support from the ERC Advanced Grant INTERSTELLAR H2020/740120. B.D. acknowledges financial support from NASA through the Astrophysics Data Analysis Program (ADAP), grant number NNX12AE20G. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 294.A-5018. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2015.1.00122.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ.","extern":"1","language":[{"iso":"eng"}],"issue":"2","arxiv":1,"author":[{"orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","last_name":"Matthee","full_name":"Matthee, Jorryt J","first_name":"Jorryt J"},{"first_name":"D.","full_name":"Sobral, D.","last_name":"Sobral"},{"last_name":"Boone","first_name":"F.","full_name":"Boone, F."},{"full_name":"Röttgering, H.","first_name":"H.","last_name":"Röttgering"},{"full_name":"Schaerer, D.","first_name":"D.","last_name":"Schaerer"},{"last_name":"Girard","first_name":"M.","full_name":"Girard, M."},{"last_name":"Pallottini","first_name":"A.","full_name":"Pallottini, A."},{"full_name":"Vallini, L.","first_name":"L.","last_name":"Vallini"},{"full_name":"Ferrara, A.","first_name":"A.","last_name":"Ferrara"},{"full_name":"Darvish, B.","first_name":"B.","last_name":"Darvish"},{"last_name":"Mobasher","first_name":"B.","full_name":"Mobasher, B."}],"date_published":"2017-12-21T00:00:00Z","abstract":[{"lang":"eng","text":"We present spectroscopic follow-up observations of CR7 with ALMA, targeted at constraining the infrared (IR) continuum and [C II]158 mm line-emission at high spatial resolution matched to the HST/WFC3 imaging. CR7 is a luminous Lyα emitting galaxy at z = 6.6 that consists of three separated UV-continuum components. Our observations reveal several well-separated components of [C II] emission. The two most luminous components in [C II] coincide with the brightest UV components (A and B), blueshifted by »150 km s−1 with respect to the\r\npeak of Lyα emission. Other [C II] components are observed close to UV clumps B and C and are blueshifted by »300 and ≈80 km s−1 with respect to the systemic redshift. We do not detect FIR continuum emission due to dust with a 3σ limiting luminosity LIR T L d 35 K 3.1 10 = <´ 10 ( ) . This allows us to mitigate uncertainties in the dust-corrected SFR and derive SFRs for the three UV clumps A, B, and C of 28, 5, and 7 M yr−1. All clumps have [C II] luminosities consistent within the scatter observed in the local relation between SFR and L[ ] C II , implying that strong Lyα emission does not necessarily anti-correlate with [C II] luminosity. Combining\r\nour measurements with the literature, we show that galaxies with blue UV slopes have weaker [C II] emission at fixed SFR, potentially due to their lower metallicities and/or higher photoionization. Comparison with hydrodynamical simulations suggests that CR7ʼs clumps have metallicities of 0.1 Z Z 0.2 < < . The observed ISM structure of CR7 indicates that we are likely witnessing the build up of a central galaxy in the early universe through complex accretion of satellites."}],"publication_identifier":{"eissn":["1538-4357"],"issn":["0004-637X"]},"oa":1,"keyword":["Space and Planetary Science","Astronomy and Astrophysics","dark ages","reionization","first stars – galaxies: formation – galaxies: high-redshift – galaxies: ISM – galaxies: kinematics and dynamics"],"publication":"The Astrophysical Journal","external_id":{"arxiv":["1709.06569"]},"title":"ALMA reveals metals yet no dust within multiple components in CR7"},{"type":"journal_article","scopus_import":"1","volume":18,"day":"01","doi":"10.1016/j.jocs.2016.06.007","status":"public","year":"2017","intvolume":"        18","citation":{"ama":"Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. A multi objective memetic inverse solver reinforced by local optimization methods. <i>Journal of Computational Science</i>. 2017;18:85-94. doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">10.1016/j.jocs.2016.06.007</a>","ieee":"E. P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, and J. Alvarez Aramberri, “A multi objective memetic inverse solver reinforced by local optimization methods,” <i>Journal of Computational Science</i>, vol. 18. Elsevier, pp. 85–94, 2017.","short":"E.P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, J. Alvarez Aramberri, Journal of Computational Science 18 (2017) 85–94.","ista":"Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. 2017. A multi objective memetic inverse solver reinforced by local optimization methods. Journal of Computational Science. 18, 85–94.","apa":"Gajda-Zagorska, E. P., Schaefer, R., Smołka, M., Pardo, D., &#38; Alvarez Aramberri, J. (2017). A multi objective memetic inverse solver reinforced by local optimization methods. <i>Journal of Computational Science</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">https://doi.org/10.1016/j.jocs.2016.06.007</a>","mla":"Gajda-Zagorska, Ewa P., et al. “A Multi Objective Memetic Inverse Solver Reinforced by Local Optimization Methods.” <i>Journal of Computational Science</i>, vol. 18, Elsevier, 2017, pp. 85–94, doi:<a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">10.1016/j.jocs.2016.06.007</a>.","chicago":"Gajda-Zagorska, Ewa P, Robert Schaefer, Maciej Smołka, David Pardo, and Julen Alvarez Aramberri. “A Multi Objective Memetic Inverse Solver Reinforced by Local Optimization Methods.” <i>Journal of Computational Science</i>. Elsevier, 2017. <a href=\"https://doi.org/10.1016/j.jocs.2016.06.007\">https://doi.org/10.1016/j.jocs.2016.06.007</a>."},"date_created":"2018-12-11T11:50:26Z","_id":"1152","date_updated":"2025-07-10T11:50:11Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Submitted Version","publisher":"Elsevier","isi":1,"article_processing_charge":"No","publication_status":"published","quality_controlled":"1","month":"01","publist_id":"6206","department":[{"_id":"ChWo"}],"language":[{"iso":"eng"}],"file":[{"relation":"main_file","file_name":"2016_jocs_ewa.pdf","date_updated":"2019-01-18T08:43:16Z","file_id":"5842","creator":"dernst","content_type":"application/pdf","date_created":"2019-01-18T08:43:16Z","file_size":1083911,"success":1,"access_level":"open_access"}],"file_date_updated":"2019-01-18T08:43:16Z","has_accepted_license":"1","publication_identifier":{"issn":["1877-7503"]},"oa":1,"ddc":["000"],"page":"85 - 94","abstract":[{"lang":"eng","text":"We propose a new memetic strategy that can solve the multi-physics, complex inverse problems, formulated as the multi-objective optimization ones, in which objectives are misfits between the measured and simulated states of various governing processes. The multi-deme structure of the strategy allows for both, intensive, relatively cheap exploration with a moderate accuracy and more accurate search many regions of Pareto set in parallel. The special type of selection operator prefers the coherent alternative solutions, eliminating artifacts appearing in the particular processes. The additional accuracy increment is obtained by the parallel convex searches applied to the local scalarizations of the misfit vector. The strategy is dedicated for solving ill-conditioned problems, for which inverting the single physical process can lead to the ambiguous results. The skill of the selection in artifact elimination is shown on the benchmark problem, while the whole strategy was applied for identification of oil deposits, where the misfits are related to various frequencies of the magnetic and electric waves of the magnetotelluric measurements. 2016 Elsevier B.V."}],"author":[{"full_name":"Gajda-Zagorska, Ewa P","first_name":"Ewa P","id":"47794CF0-F248-11E8-B48F-1D18A9856A87","last_name":"Gajda-Zagorska"},{"last_name":"Schaefer","full_name":"Schaefer, Robert","first_name":"Robert"},{"last_name":"Smołka","first_name":"Maciej","full_name":"Smołka, Maciej"},{"last_name":"Pardo","full_name":"Pardo, David","first_name":"David"},{"last_name":"Alvarez Aramberri","first_name":"Julen","full_name":"Alvarez Aramberri, Julen"}],"date_published":"2017-01-01T00:00:00Z","external_id":{"isi":["000393528700009"]},"title":"A multi objective memetic inverse solver reinforced by local optimization methods","publication":"Journal of Computational Science"},{"date_published":"2017-10-01T00:00:00Z","author":[{"full_name":"Matthee, Jorryt J","first_name":"Jorryt J","id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X","last_name":"Matthee"},{"last_name":"Sobral","first_name":"David","full_name":"Sobral, David"},{"last_name":"Best","first_name":"Philip","full_name":"Best, Philip"},{"last_name":"Smail","full_name":"Smail, Ian","first_name":"Ian"},{"last_name":"Bian","full_name":"Bian, Fuyan","first_name":"Fuyan"},{"full_name":"Darvish, Behnam","first_name":"Behnam","last_name":"Darvish"},{"last_name":"Röttgering","full_name":"Röttgering, Huub","first_name":"Huub"},{"last_name":"Fan","first_name":"Xiaohui","full_name":"Fan, Xiaohui"}],"abstract":[{"text":"We present a sample of ∼1000 emission-line galaxies at z = 0.4–4.7 from the ∼0.7deg2 High-z Emission-Line Survey in the Boötes field identified with a suite of six narrow-band filters at ≈0.4–2.1 μm. These galaxies have been selected on their Ly α (73), [O II] (285), H β/[O III] (387) or H α (362) emission line, and have been classified with optical to near-infrared colours. A subsample of 98 sources have reliable redshifts from multiple narrow-band (e.g. [O II]–H α) detections and/or spectroscopy. In this survey paper, we present the observations, selection and catalogues of emitters. We measure number densities of Ly α, [O II], H β/[O III] and H α and confirm strong luminosity evolution in star-forming galaxies from z ∼ 0.4 to ∼5, in agreement with previous results. To demonstrate the usefulness of dual-line emitters, we use the sample of dual [O II]–H α emitters to measure the observed [O II]/H α ratio at z = 1.47. The observed [O II]/H α ratio increases significantly from 0.40 ± 0.01 at z = 0.1 to 0.52 ± 0.05 at z = 1.47, which we attribute to either decreasing dust attenuation with redshift, or due to a bias in the (typically) fibre measurements in the local Universe that only measure the central kpc regions. At the bright end, we find that both the H α and Ly α number densities at z ≈ 2.2 deviate significantly from a Schechter form, following a power law. We show that this is driven entirely by an increasing X-ray/active galactic nucleus fraction with line luminosity, which reaches ≈100 per cent at line luminosities L ≳ 3 × 1044 erg s−1.","lang":"eng"}],"page":"629-649","oa":1,"publication_identifier":{"issn":["0035-8711","1365-2966"]},"keyword":["Space and Planetary Science","Astronomy and Astrophysics galaxies","active","galaxies","evolution","galaxies","high-redshift","galaxies","luminosity function","mass function","galaxies: star formation"],"publication":"Monthly Notices of the Royal Astronomical Society","title":"Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7","external_id":{"arxiv":["1702.04721"]},"extern":"1","language":[{"iso":"eng"}],"issue":"1","arxiv":1,"publication_status":"published","article_processing_charge":"No","publisher":"Oxford University Press","oa_version":"Preprint","date_updated":"2024-10-14T11:34:07Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"11561","month":"10","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1702.04721"}],"quality_controlled":"1","day":"01","volume":471,"scopus_import":"1","type":"journal_article","date_created":"2022-07-12T11:01:35Z","intvolume":"       471","citation":{"chicago":"Matthee, Jorryt J, David Sobral, Philip Best, Ian Smail, Fuyan Bian, Behnam Darvish, Huub Röttgering, and Xiaohui Fan. “Boötes-HiZELS: An Optical to near-Infrared Survey of Emission-Line Galaxies at z = 0.4–4.7.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stx1569\">https://doi.org/10.1093/mnras/stx1569</a>.","mla":"Matthee, Jorryt J., et al. “Boötes-HiZELS: An Optical to near-Infrared Survey of Emission-Line Galaxies at z = 0.4–4.7.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 1, Oxford University Press, 2017, pp. 629–49, doi:<a href=\"https://doi.org/10.1093/mnras/stx1569\">10.1093/mnras/stx1569</a>.","apa":"Matthee, J. J., Sobral, D., Best, P., Smail, I., Bian, F., Darvish, B., … Fan, X. (2017). Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx1569\">https://doi.org/10.1093/mnras/stx1569</a>","ista":"Matthee JJ, Sobral D, Best P, Smail I, Bian F, Darvish B, Röttgering H, Fan X. 2017. Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7. Monthly Notices of the Royal Astronomical Society. 471(1), 629–649.","short":"J.J. Matthee, D. Sobral, P. Best, I. Smail, F. Bian, B. Darvish, H. Röttgering, X. Fan, Monthly Notices of the Royal Astronomical Society 471 (2017) 629–649.","ama":"Matthee JJ, Sobral D, Best P, et al. Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;471(1):629-649. doi:<a href=\"https://doi.org/10.1093/mnras/stx1569\">10.1093/mnras/stx1569</a>","ieee":"J. J. Matthee <i>et al.</i>, “Boötes-HiZELS: An optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 1. Oxford University Press, pp. 629–649, 2017."},"article_type":"original","year":"2017","status":"public","doi":"10.1093/mnras/stx1569"},{"publisher":"Oxford University Press","publication_status":"published","article_processing_charge":"No","_id":"11562","oa_version":"Preprint","date_updated":"2024-10-14T11:35:37Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"04","quality_controlled":"1","main_file_link":[{"url":"https://arxiv.org/abs/1609.05897","open_access":"1"}],"volume":466,"day":"01","type":"journal_article","scopus_import":"1","year":"2017","article_type":"original","status":"public","date_created":"2022-07-12T12:04:16Z","citation":{"ama":"Sobral D, Matthee JJ, Best P, et al. The CALYMHA survey: Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;466(1):1242-1258. doi:<a href=\"https://doi.org/10.1093/mnras/stw3090\">10.1093/mnras/stw3090</a>","ieee":"D. Sobral <i>et al.</i>, “The CALYMHA survey: Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 466, no. 1. Oxford University Press, pp. 1242–1258, 2017.","ista":"Sobral D, Matthee JJ, Best P, Stroe A, Röttgering H, Oteo I, Smail I, Morabito L, Paulino-Afonso A. 2017. The CALYMHA survey: Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23. Monthly Notices of the Royal Astronomical Society. 466(1), 1242–1258.","short":"D. Sobral, J.J. Matthee, P. Best, A. Stroe, H. Röttgering, I. Oteo, I. Smail, L. Morabito, A. Paulino-Afonso, Monthly Notices of the Royal Astronomical Society 466 (2017) 1242–1258.","apa":"Sobral, D., Matthee, J. J., Best, P., Stroe, A., Röttgering, H., Oteo, I., … Paulino-Afonso, A. (2017). The CALYMHA survey: Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stw3090\">https://doi.org/10.1093/mnras/stw3090</a>","chicago":"Sobral, David, Jorryt J Matthee, Philip Best, Andra Stroe, Huub Röttgering, Iván Oteo, Ian Smail, Leah Morabito, and Ana Paulino-Afonso. “The CALYMHA Survey: Lyα Luminosity Function and Global Escape Fraction of Lyα Photons at z = 2.23.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stw3090\">https://doi.org/10.1093/mnras/stw3090</a>.","mla":"Sobral, David, et al. “The CALYMHA Survey: Lyα Luminosity Function and Global Escape Fraction of Lyα Photons at z = 2.23.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 466, no. 1, Oxford University Press, 2017, pp. 1242–58, doi:<a href=\"https://doi.org/10.1093/mnras/stw3090\">10.1093/mnras/stw3090</a>."},"intvolume":"       466","doi":"10.1093/mnras/stw3090","date_published":"2017-04-01T00:00:00Z","author":[{"last_name":"Sobral","first_name":"David","full_name":"Sobral, David"},{"last_name":"Matthee","id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"},{"last_name":"Best","first_name":"Philip","full_name":"Best, Philip"},{"last_name":"Stroe","full_name":"Stroe, Andra","first_name":"Andra"},{"full_name":"Röttgering, Huub","first_name":"Huub","last_name":"Röttgering"},{"full_name":"Oteo, Iván","first_name":"Iván","last_name":"Oteo"},{"first_name":"Ian","full_name":"Smail, Ian","last_name":"Smail"},{"full_name":"Morabito, Leah","first_name":"Leah","last_name":"Morabito"},{"first_name":"Ana","full_name":"Paulino-Afonso, Ana","last_name":"Paulino-Afonso"}],"page":"1242-1258","abstract":[{"text":"We present the CAlibrating LYMan-α with Hα (CALYMHA) pilot survey and new results on Lyman α (Lyα) selected galaxies at z ∼ 2. We use a custom-built Lyα narrow-band filter at the Isaac Newton Telescope, designed to provide a matched volume coverage to the z = 2.23 Hα HiZELS survey. Here, we present the first results for the COSMOS and UDS fields. Our survey currently reaches a 3σ line flux limit of ∼4 × 10−17 erg s−1 cm−2, and a Lyα luminosity limit of ∼1042.3 erg s−1. We find 188 Lyα emitters over 7.3 × 105 Mpc3, but also find significant numbers of other line-emitting sources corresponding to He II, C III] and C IV emission lines. These sources are important contaminants, and we carefully remove them, unlike most previous studies. We find that the Lyα luminosity function at z = 2.23 is very well described by a Schechter function up to LLy α ≈ 1043 erg s−1 with L∗=1042.59+0.16−0.08 erg s−1, ϕ∗=10−3.09+0.14−0.34 Mpc−3 and α = −1.75 ± 0.25. Above LLy α ≈ 1043 erg s−1, the Lyα luminosity function becomes power-law like, driven by X-ray AGN. We find that Lyα-selected emitters have a high escape fraction of 37 ± 7 per cent, anticorrelated with Lyα luminosity and correlated with Lyα equivalent width. Lyα emitters have ubiquitous large (≈40 kpc) Lyα haloes, ∼2 times larger than their Hα extents. By directly comparing our Lyα and Hα luminosity functions, we find that the global/overall escape fraction of Lyα photons (within a 13 kpc radius) from the full population of star-forming galaxies is 5.1 ± 0.2 per cent at the peak of the star formation history. An extra 3.3 ± 0.3 per cent of Lyα photons likely still escape, but at larger radii.","lang":"eng"}],"publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"oa":1,"publication":"Monthly Notices of the Royal Astronomical Society","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: haloes","galaxies: high-redshift","galaxies: luminosity function","mass function","galaxies: statistics","cosmology: observations"],"external_id":{"arxiv":["1609.05897"]},"title":"The CALYMHA survey: Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23","extern":"1","acknowledgement":"We thank the reviewer for his/her helpful comments and suggestions that have greatly improved this work. DS and JM acknowledge financial support from the Netherlands Organisation for Scientific research (NWO) through a Veni fellowship. DS also acknowledges funding from FCT through an FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010). PNB is grateful for support from the UK STFC via grant ST/M001229/1. IRS acknowledges support from STFC (ST/L00075X/1), the ERC Advanced Investigator programme DUSTYGAL 321334 and a Royal Society/Wolfson merit award. We thank Matthew Hayes, Ryan Trainor, Kimihiko Nakajima and Anne Verhamme for many helpful discussions and Ana Sobral, Carolina Duarte and Miguel Domingos for taking part in observations with the NB392 filter. We also thank Sergio Santos for helpful comments. This research is based on observations obtained on the Isaac Newton Telescope (INT), programs: I13AN002, I14AN002, 088-INT7/14A, I14BN006, 118-INT13/14B & I15AN008. The authors acknowledge the award of time from programmes: I13AN002, I14AN002, 088-INT7/14A, I14BN006, 118-INT13/14B, I15AN008 on the INT. INT is operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 098.A 0819. We have benefited greatly from the publicly available programming language PYTHON, including the NUMPY, MATPLOTLIB, PYFITS, SCIPY and ASTROPY packages, the astronomical imaging tools SEXTRACTOR, SWARP (Bertin & Arnouts 1996; Bertin 2010), SCAMP (Bertin 2006) and TOPCAT (Taylor 2005). Dedicated to the memory of M. L. Nicolau and M. C. Serrano.","language":[{"iso":"eng"}],"issue":"1","arxiv":1},{"status":"public","article_type":"original","year":"2017","intvolume":"       465","citation":{"short":"J.J. Matthee, D. Sobral, P. Best, A.A. Khostovan, I. Oteo, R. Bouwens, H. Röttgering, Monthly Notices of the Royal Astronomical Society 465 (2017) 3637–3655.","ista":"Matthee JJ, Sobral D, Best P, Khostovan AA, Oteo I, Bouwens R, Röttgering H. 2017. The production and escape of Lyman-Continuum radiation from star-forming galaxies at z ∼ 2 and their redshift evolution. Monthly Notices of the Royal Astronomical Society. 465(3), 3637–3655.","ama":"Matthee JJ, Sobral D, Best P, et al. The production and escape of Lyman-Continuum radiation from star-forming galaxies at z ∼ 2 and their redshift evolution. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;465(3):3637-3655. doi:<a href=\"https://doi.org/10.1093/mnras/stw2973\">10.1093/mnras/stw2973</a>","ieee":"J. J. Matthee <i>et al.</i>, “The production and escape of Lyman-Continuum radiation from star-forming galaxies at z ∼ 2 and their redshift evolution,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 465, no. 3. Oxford University Press, pp. 3637–3655, 2017.","chicago":"Matthee, Jorryt J, David Sobral, Philip Best, Ali Ahmad Khostovan, Iván Oteo, Rychard Bouwens, and Huub Röttgering. “The Production and Escape of Lyman-Continuum Radiation from Star-Forming Galaxies at z ∼ 2 and Their Redshift Evolution.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stw2973\">https://doi.org/10.1093/mnras/stw2973</a>.","mla":"Matthee, Jorryt J., et al. “The Production and Escape of Lyman-Continuum Radiation from Star-Forming Galaxies at z ∼ 2 and Their Redshift Evolution.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 465, no. 3, Oxford University Press, 2017, pp. 3637–55, doi:<a href=\"https://doi.org/10.1093/mnras/stw2973\">10.1093/mnras/stw2973</a>.","apa":"Matthee, J. J., Sobral, D., Best, P., Khostovan, A. A., Oteo, I., Bouwens, R., &#38; Röttgering, H. (2017). The production and escape of Lyman-Continuum radiation from star-forming galaxies at z ∼ 2 and their redshift evolution. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stw2973\">https://doi.org/10.1093/mnras/stw2973</a>"},"date_created":"2022-07-12T12:12:14Z","doi":"10.1093/mnras/stw2973","volume":465,"day":"01","type":"journal_article","scopus_import":"1","month":"03","main_file_link":[{"url":"https://arxiv.org/abs/1605.08782","open_access":"1"}],"quality_controlled":"1","publisher":"Oxford University Press","article_processing_charge":"No","publication_status":"published","_id":"11564","date_updated":"2024-10-14T11:35:49Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Preprint","arxiv":1,"issue":"3","extern":"1","acknowledgement":"We thank the referee for the many helpful and constructive comments which have significantly improved this paper. JM acknowledges the support of a Huygens PhD fellowship from Leiden University. DS acknowledges financial support from the Netherlands Organization for Scientific research (NWO) through a Veni fellowship and from FCT through an FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010). PNB is grateful for support from the UK STFC via grant ST/M001229/1. IO acknowledges support from the European Research Council in the form of the Advanced Investigator Programme, 321302, COSMICISM. The authors thank Andreas Faisst, Michael Rutkowski and Andreas Sandberg for answering questions related to this work and Daniel Schaerer and Mark Dijkstra for discussions. We acknowledge the work that has been done by both the COSMOS team in assembling such large, state-of-the-art multi-wavelength data set, as this has been crucial for the results presented in this paper. We have benefited greatly from the public available programming language PYTHON, including the NUMPY, MATPLOTLIB, PYFITS, SCIPY (Jones et al. 2001; Hunter 2007; Van Der Walt, Colbert & Varoquaux 2011) and ASTROPY (Astropy Collaboration et al. 2013) packages, the astronomical imaging tools SEXTRACTOR and SWARP (Bertin & Arnouts 1996;\r\nBertin 2010) and the TOPCAT analysis program (Taylor 2013).","language":[{"iso":"eng"}],"keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: high-redshift","cosmology: observations","dark ages","reionization","first stars"],"publication":"Monthly Notices of the Royal Astronomical Society","external_id":{"arxiv":["1605.08782"]},"title":"The production and escape of Lyman-Continuum radiation from star-forming galaxies at z ∼ 2 and their redshift evolution","abstract":[{"lang":"eng","text":"We study the production rate of ionizing photons of a sample of 588 Hα emitters (HAEs) and 160 Lyman-α emitters (LAEs) at z = 2.2 in the COSMOS field in order to assess the implied emissivity from galaxies, based on their ultraviolet (UV) luminosity. By exploring the rest-frame Lyman Continuum (LyC) with GALEX/NUV data, we find fesc < 2.8 (6.4) per cent through median (mean) stacking. By combining the Hα luminosity density with intergalactic medium emissivity measurements from absorption studies, we find a globally averaged 〈fesc〉 of 5.9+14.5−4.2 per cent at z = 2.2 if we assume HAEs are the only source of ionizing photons. We find similarly low values of the global 〈fesc〉 at z ≈ 3–5, also ruling out a high 〈fesc〉 at z < 5. These low escape fractions allow us to measure ξion, the number of produced ionizing photons per unit UV luminosity, and investigate how this depends on galaxy properties. We find a typical ξion ≈ 1024.77 ± 0.04 Hz erg−1 for HAEs and ξion ≈ 1025.14 ± 0.09 Hz erg−1 for LAEs. LAEs and low-mass HAEs at z = 2.2 show similar values of ξion as typically assumed in the reionization era, while the typical HAE is three times less ionizing. Due to an increasing ξion with increasing EW(Hα), ξion likely increases with redshift. This evolution alone is fully in line with the observed evolution of ξion between z ≈ 2 and 5, indicating a typical value of ξion ≈ 1025.4 Hz erg−1 in the reionization era."}],"page":"3637-3655","author":[{"first_name":"Jorryt J","full_name":"Matthee, Jorryt J","last_name":"Matthee","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720"},{"full_name":"Sobral, David","first_name":"David","last_name":"Sobral"},{"last_name":"Best","full_name":"Best, Philip","first_name":"Philip"},{"last_name":"Khostovan","first_name":"Ali Ahmad","full_name":"Khostovan, Ali Ahmad"},{"last_name":"Oteo","first_name":"Iván","full_name":"Oteo, Iván"},{"first_name":"Rychard","full_name":"Bouwens, Rychard","last_name":"Bouwens"},{"last_name":"Röttgering","first_name":"Huub","full_name":"Röttgering, Huub"}],"date_published":"2017-03-01T00:00:00Z","publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"oa":1},{"_id":"11565","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2024-10-14T11:36:05Z","oa_version":"Preprint","publisher":"Oxford University Press","article_processing_charge":"No","publication_status":"published","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1608.08218"}],"quality_controlled":"1","month":"02","type":"journal_article","scopus_import":"1","volume":465,"day":"01","doi":"10.1093/mnras/stw2884","status":"public","year":"2017","article_type":"original","citation":{"mla":"Matthee, Jorryt J., et al. “The Origin of Scatter in the Stellar Mass–Halo Mass Relation of Central Galaxies in the EAGLE Simulation.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 465, no. 2, Oxford University Press, 2017, pp. 2381–96, doi:<a href=\"https://doi.org/10.1093/mnras/stw2884\">10.1093/mnras/stw2884</a>.","chicago":"Matthee, Jorryt J, Joop Schaye, Robert A. Crain, Matthieu Schaller, Richard Bower, and Tom Theuns. “The Origin of Scatter in the Stellar Mass–Halo Mass Relation of Central Galaxies in the EAGLE Simulation.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stw2884\">https://doi.org/10.1093/mnras/stw2884</a>.","apa":"Matthee, J. J., Schaye, J., Crain, R. A., Schaller, M., Bower, R., &#38; Theuns, T. (2017). The origin of scatter in the stellar mass–halo mass relation of central galaxies in the EAGLE simulation. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stw2884\">https://doi.org/10.1093/mnras/stw2884</a>","short":"J.J. Matthee, J. Schaye, R.A. Crain, M. Schaller, R. Bower, T. Theuns, Monthly Notices of the Royal Astronomical Society 465 (2017) 2381–2396.","ista":"Matthee JJ, Schaye J, Crain RA, Schaller M, Bower R, Theuns T. 2017. The origin of scatter in the stellar mass–halo mass relation of central galaxies in the EAGLE simulation. Monthly Notices of the Royal Astronomical Society. 465(2), 2381–2396.","ieee":"J. J. Matthee, J. Schaye, R. A. Crain, M. Schaller, R. Bower, and T. Theuns, “The origin of scatter in the stellar mass–halo mass relation of central galaxies in the EAGLE simulation,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 465, no. 2. Oxford University Press, pp. 2381–2396, 2017.","ama":"Matthee JJ, Schaye J, Crain RA, Schaller M, Bower R, Theuns T. The origin of scatter in the stellar mass–halo mass relation of central galaxies in the EAGLE simulation. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;465(2):2381-2396. doi:<a href=\"https://doi.org/10.1093/mnras/stw2884\">10.1093/mnras/stw2884</a>"},"intvolume":"       465","date_created":"2022-07-12T12:25:08Z","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"oa":1,"page":"2381-2396","abstract":[{"text":"We use the hydrodynamical EAGLE simulation to study the magnitude and origin of the scatter in the stellar mass–halo mass relation for central galaxies. We separate cause and effect by correlating stellar masses in the baryonic simulation with halo properties in a matched dark matter only (DMO) simulation. The scatter in stellar mass increases with redshift and decreases with halo mass. At z = 0.1, it declines from 0.25 dex at M200, DMO ≈ 1011 M⊙ to 0.12 dex at M200, DMO ≈ 1013 M⊙, but the trend is weak above 1012 M⊙. For M200, DMO < 1012.5 M⊙ up to 0.04 dex of the scatter is due to scatter in the halo concentration. At fixed halo mass, a larger stellar mass corresponds to a more concentrated halo. This is likely because higher concentrations imply earlier formation times and hence more time for accretion and star formation, and/or because feedback is less efficient in haloes with higher binding energies. The maximum circular velocity, Vmax, DMO, and binding energy are therefore more fundamental properties than halo mass, meaning that they are more accurate predictors of stellar mass, and we provide fitting formulae for their relations with stellar mass. However, concentration alone cannot explain the total scatter in the Mstar−M200,DMO relation, and it does not explain the scatter in Mstar–Vmax, DMO. Halo spin, sphericity, triaxiality, substructure and environment are also not responsible for the remaining scatter, which thus could be due to more complex halo properties or non-linear/stochastic baryonic effects.","lang":"eng"}],"author":[{"last_name":"Matthee","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"},{"first_name":"Joop","full_name":"Schaye, Joop","last_name":"Schaye"},{"last_name":"Crain","full_name":"Crain, Robert A.","first_name":"Robert A."},{"last_name":"Schaller","first_name":"Matthieu","full_name":"Schaller, Matthieu"},{"last_name":"Bower","first_name":"Richard","full_name":"Bower, Richard"},{"last_name":"Theuns","first_name":"Tom","full_name":"Theuns, Tom"}],"date_published":"2017-02-01T00:00:00Z","external_id":{"arxiv":["1608.08218"]},"title":"The origin of scatter in the stellar mass–halo mass relation of central galaxies in the EAGLE simulation","publication":"Monthly Notices of the Royal Astronomical Society","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: formation","galaxies: haloes","cosmology: theory"],"language":[{"iso":"eng"}],"acknowledgement":"We thank the anonymous referee for their comments. JM acknowledges the support of a Huygens PhD fellowship from Leiden University. JM thanks David Sobral for useful discussions and help with fitting routines and Jonas Chavez Montero and Ying Zu for providing data. We thank PRACE for the access to the Curie facility in France. We have used the DiRAC system which is a part of National E-Infrastructure at Durham University, operated by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk); the equipment was funded by BIS National E-infrastructure capital grant ST/K00042X/1, STFC capital grant ST/H008519/1, STFC DiRAC Operations grant ST/K003267/1 and Durham University. The study was sponsored by the Dutch National Computing Facilities Foundation (NCF) for the use of supercomputer facilities, with financial support from the Netherlands Organisation for Scientific Research (NWO), through VICI grant 639.043.409, and the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement 278594- GasAroundGalaxies, and from the Belgian Science Policy Office ([AP P7/08 CHARM]). We have benefited greatly from the public available programming language PYTHON, including the NUMPY, MATPLOTLIB, PYFITS, SCIPY, H5PY and RPY2 packages, and the TOPCAT analysis program (Taylor 2005).","extern":"1","arxiv":1,"issue":"2"},{"publication_status":"published","article_processing_charge":"No","publisher":"Oxford University Press","oa_version":"Preprint","date_updated":"2022-08-19T07:59:57Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"11566","month":"11","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1703.10169"}],"quality_controlled":"1","day":"01","volume":471,"scopus_import":"1","type":"journal_article","date_created":"2022-07-12T12:33:16Z","citation":{"ieee":"A. Stroe, D. Sobral, J. J. Matthee, J. Calhau, and I. Oteo, “A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, morphologies and equivalent widths ,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 3. Oxford University Press, pp. 2558–2574, 2017.","ama":"Stroe A, Sobral D, Matthee JJ, Calhau J, Oteo I. A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, morphologies and equivalent widths . <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;471(3):2558-2574. doi:<a href=\"https://doi.org/10.1093/mnras/stx1712\">10.1093/mnras/stx1712</a>","ista":"Stroe A, Sobral D, Matthee JJ, Calhau J, Oteo I. 2017. A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, morphologies and equivalent widths . Monthly Notices of the Royal Astronomical Society. 471(3), 2558–2574.","short":"A. Stroe, D. Sobral, J.J. Matthee, J. Calhau, I. Oteo, Monthly Notices of the Royal Astronomical Society 471 (2017) 2558–2574.","apa":"Stroe, A., Sobral, D., Matthee, J. J., Calhau, J., &#38; Oteo, I. (2017). A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, morphologies and equivalent widths . <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx1712\">https://doi.org/10.1093/mnras/stx1712</a>","mla":"Stroe, Andra, et al. “A 1.4 Deg2 Blind Survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, Morphologies and Equivalent Widths .” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 3, Oxford University Press, 2017, pp. 2558–74, doi:<a href=\"https://doi.org/10.1093/mnras/stx1712\">10.1093/mnras/stx1712</a>.","chicago":"Stroe, Andra, David Sobral, Jorryt J Matthee, João Calhau, and Ivan Oteo. “A 1.4 Deg2 Blind Survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, Morphologies and Equivalent Widths .” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stx1712\">https://doi.org/10.1093/mnras/stx1712</a>."},"intvolume":"       471","article_type":"original","year":"2017","status":"public","doi":"10.1093/mnras/stx1712","date_published":"2017-11-01T00:00:00Z","author":[{"last_name":"Stroe","first_name":"Andra","full_name":"Stroe, Andra"},{"first_name":"David","full_name":"Sobral, David","last_name":"Sobral"},{"id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X","last_name":"Matthee","full_name":"Matthee, Jorryt J","first_name":"Jorryt J"},{"last_name":"Calhau","first_name":"João","full_name":"Calhau, João"},{"last_name":"Oteo","first_name":"Ivan","full_name":"Oteo, Ivan"}],"page":"2558-2574","abstract":[{"lang":"eng","text":"While traditionally associated with active galactic nuclei (AGN), the properties of the C II] (λ = 2326 Å), C III] (λ, λ = 1907, 1909 Å) and C IV (λ, λ = 1549, 1551 Å) emission lines are still uncertain as large, unbiased samples of sources are scarce. We present the first blind, statistical study of C II], C III] and C IV emitters at z ∼ 0.68, 1.05, 1.53, respectively, uniformly selected down to a flux limit of ∼4 × 10−17 erg s−1 cm−1 through a narrow-band survey covering an area of ∼1.4 deg2 over COSMOS and UDS. We detect 16 C II], 35 C III] and 17 C IV emitters, whose nature we investigate using optical colours as well as Hubble Space Telescope (HST), X-ray, radio and far-infrared data. We find that z ∼ 0.7 C II] emitters are consistent with a mixture of blue (UV slope β = −2.0 ± 0.4) star-forming (SF) galaxies with discy HST structure and AGN with Seyfert-like morphologies. Bright C II] emitters have individual X-ray detections as well as high average black hole accretion rates (BHARs) of ∼0.1 M⊙ yr−1. C III] emitters at z ∼ 1.05 trace a general population of SF galaxies, with β = −0.8 ± 1.1, a variety of optical morphologies, including isolated and interacting galaxies and low BHAR (<0.02 M⊙ yr−1). Our C IV emitters at z ∼ 1.5 are consistent with young, blue quasars (β ∼ −1.9) with point-like optical morphologies, bright X-ray counterparts and large BHAR (0.8  M⊙ yr−1). We also find some surprising C II], C III] and C IV emitters with rest-frame equivalent widths (EWs) that could be as large as 50–100 Å. AGN or spatial offsets between the UV continuum stellar disc and the line-emitting regions may explain the large EW. These bright C II], C III] and C IV emitters are ideal candidates for spectroscopic follow-up to fully unveil their nature."}],"oa":1,"publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"publication":"Monthly Notices of the Royal Astronomical Society","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: active","galaxies: high-redshift","quasars: emission lines","galaxies: star formation","cosmology: observations"],"title":"A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – I. Nature, morphologies and equivalent widths ","external_id":{"arxiv":["1703.10169"]},"extern":"1","acknowledgement":"We would like to thank the anonymous referee for her/his valuable input that helped improve the clarity and interpretation of our results. DS acknowledges financial support from the Netherlands Organisation for Scientific research (NWO), through a Veni fellowship. IO acknowledges support from the European Research Council in the form of the Advanced Investigator Programme, 321302, COSMICISM. CALYMHA data are based on observations made with the Isaac Newton Telescope (proposals 13AN002, I14AN002, 088-INT7/14A, I14BN006, 118-INT13/14B, I15AN008) operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. Also based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme IDs 098.A-0819 and 179.A-2005. We are grateful to E. L. Wright and J. Schombert for their cosmology calculator. We would like to thank the authors of NUMPY (van der Walt et al. 2011), SCIPY (Jones et al. 2001), MATPLOTLIB (Hunter 2007) and ASTROPY (Astropy Collaboration et al. 2013) for making these packages publicly available. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is ","language":[{"iso":"eng"}],"issue":"3","arxiv":1},{"type":"journal_article","scopus_import":"1","volume":471,"day":"01","doi":"10.1093/mnras/stx1713","status":"public","article_type":"original","year":"2017","citation":{"short":"A. Stroe, D. Sobral, J.J. Matthee, J. Calhau, I. Oteo, Monthly Notices of the Royal Astronomical Society 471 (2017) 2575–2586.","ista":"Stroe A, Sobral D, Matthee JJ, Calhau J, Oteo I. 2017. A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios. Monthly Notices of the Royal Astronomical Society. 471(3), 2575–2586.","ieee":"A. Stroe, D. Sobral, J. J. Matthee, J. Calhau, and I. Oteo, “A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 3. Oxford University Press, pp. 2575–2586, 2017.","ama":"Stroe A, Sobral D, Matthee JJ, Calhau J, Oteo I. A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;471(3):2575-2586. doi:<a href=\"https://doi.org/10.1093/mnras/stx1713\">10.1093/mnras/stx1713</a>","chicago":"Stroe, Andra, David Sobral, Jorryt J Matthee, João Calhau, and Ivan Oteo. “A 1.4 Deg2 Blind Survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity Functions and Cosmic Average Line Ratios.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stx1713\">https://doi.org/10.1093/mnras/stx1713</a>.","mla":"Stroe, Andra, et al. “A 1.4 Deg2 Blind Survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity Functions and Cosmic Average Line Ratios.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 3, Oxford University Press, 2017, pp. 2575–86, doi:<a href=\"https://doi.org/10.1093/mnras/stx1713\">10.1093/mnras/stx1713</a>.","apa":"Stroe, A., Sobral, D., Matthee, J. J., Calhau, J., &#38; Oteo, I. (2017). A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx1713\">https://doi.org/10.1093/mnras/stx1713</a>"},"intvolume":"       471","date_created":"2022-07-12T12:54:57Z","_id":"11567","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2022-08-19T08:02:04Z","oa_version":"Preprint","publisher":"Oxford University Press","article_processing_charge":"No","publication_status":"published","quality_controlled":"1","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1703.10169"}],"month":"11","language":[{"iso":"eng"}],"extern":"1","arxiv":1,"issue":"3","publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"oa":1,"page":"2575-2586","abstract":[{"lang":"eng","text":"Recently, the C III] and C IV emission lines have been observed in galaxies in the early Universe (z > 5), providing new ways to measure their redshift and study their stellar populations and active galactic nuclei (AGN). We explore the first blind C II], C III] and C IV survey (z ∼ 0.68, 1.05, 1.53, respectively) presented in Stroe et al. (2017). We derive luminosity functions (LF) and study properties of C II], C III] and C IV line emitters through comparisons to the LFs of H α and Ly α emitters, UV selected star-forming (SF) galaxies and quasars at similar redshifts. The C II] LF at z ∼ 0.68 is equally well described by a Schechter or a power-law LF, characteristic of a mixture of SF and AGN activity. The C III] LF (z ∼ 1.05) is consistent to a scaled down version of the Schechter H α and Ly α LF at their redshift, indicating a SF origin. In stark contrast, the C IV LF at z ∼ 1.53 is well fit by a power-law, quasar-like LF. We find that the brightest UV sources (MUV < −22) will universally have C III] and C IV emission. However, on average, C III] and C IV are not as abundant as H α or Ly α emitters at the same redshift, with cosmic average ratios of ∼0.02–0.06 to H α and ∼0.01–0.1 to intrinsic Ly α. We predict that the C III] and C IV lines can only be truly competitive in confirming high-redshift candidates when the hosts are intrinsically bright and the effective Ly α escape fraction is below 1 per cent. While C III] and C IV were proposed as good tracers of young, relatively low-metallicity galaxies typical of the early Universe, we find that, at least at z ∼ 1.5, C IV is exclusively hosted by AGN/quasars, especially at large line equivalent widths."}],"author":[{"last_name":"Stroe","full_name":"Stroe, Andra","first_name":"Andra"},{"full_name":"Sobral, David","first_name":"David","last_name":"Sobral"},{"last_name":"Matthee","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"},{"last_name":"Calhau","first_name":"João","full_name":"Calhau, João"},{"first_name":"Ivan","full_name":"Oteo, Ivan","last_name":"Oteo"}],"date_published":"2017-11-01T00:00:00Z","external_id":{"arxiv":["1703.10169"]},"title":"A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: active","galaxies: high redshift","galaxies: luminosity function","mass function","quasars: emission lines","star formation","cosmology: observations"],"publication":"Monthly Notices of the Royal Astronomical Society"},{"publisher":"Oxford University Press","article_processing_charge":"No","publication_status":"published","_id":"11572","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2024-10-14T11:36:26Z","oa_version":"Preprint","month":"11","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1706.06591"}],"quality_controlled":"1","volume":472,"day":"01","type":"journal_article","scopus_import":"1","status":"public","article_type":"original","year":"2017","citation":{"mla":"Matthee, Jorryt J., et al. “Spectroscopic Properties of Luminous Ly α Emitters at z ≈ 6–7 and Comparison to the Lyman-Break Population.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 472, no. 1, Oxford University Press, 2017, pp. 772–87, doi:<a href=\"https://doi.org/10.1093/mnras/stx2061\">10.1093/mnras/stx2061</a>.","chicago":"Matthee, Jorryt J, David Sobral, Behnam Darvish, Sérgio Santos, Bahram Mobasher, Ana Paulino-Afonso, Huub Röttgering, and Lara Alegre. “Spectroscopic Properties of Luminous Ly α Emitters at z ≈ 6–7 and Comparison to the Lyman-Break Population.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stx2061\">https://doi.org/10.1093/mnras/stx2061</a>.","apa":"Matthee, J. J., Sobral, D., Darvish, B., Santos, S., Mobasher, B., Paulino-Afonso, A., … Alegre, L. (2017). Spectroscopic properties of luminous Ly α emitters at z ≈ 6–7 and comparison to the Lyman-break population. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx2061\">https://doi.org/10.1093/mnras/stx2061</a>","ista":"Matthee JJ, Sobral D, Darvish B, Santos S, Mobasher B, Paulino-Afonso A, Röttgering H, Alegre L. 2017. Spectroscopic properties of luminous Ly α emitters at z ≈ 6–7 and comparison to the Lyman-break population. Monthly Notices of the Royal Astronomical Society. 472(1), 772–787.","short":"J.J. Matthee, D. Sobral, B. Darvish, S. Santos, B. Mobasher, A. Paulino-Afonso, H. Röttgering, L. Alegre, Monthly Notices of the Royal Astronomical Society 472 (2017) 772–787.","ama":"Matthee JJ, Sobral D, Darvish B, et al. Spectroscopic properties of luminous Ly α emitters at z ≈ 6–7 and comparison to the Lyman-break population. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;472(1):772-787. doi:<a href=\"https://doi.org/10.1093/mnras/stx2061\">10.1093/mnras/stx2061</a>","ieee":"J. J. Matthee <i>et al.</i>, “Spectroscopic properties of luminous Ly α emitters at z ≈ 6–7 and comparison to the Lyman-break population,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 472, no. 1. Oxford University Press, pp. 772–787, 2017."},"intvolume":"       472","date_created":"2022-07-13T09:47:39Z","doi":"10.1093/mnras/stx2061","page":"772-787","abstract":[{"lang":"eng","text":"We present spectroscopic follow-up of candidate luminous Ly α emitters (LAEs) at z = 5.7–6.6 in the SA22 field with VLT/X-SHOOTER. We confirm two new luminous LAEs at z = 5.676 (SR6) and z = 6.532 (VR7), and also present HST follow-up of both sources. These sources have luminosities LLy α ≈ 3 × 1043 erg s−1, very high rest-frame equivalent widths of EW0 ≳ 200 Å and narrow Ly α lines (200–340 km s−1). VR7 is the most UV-luminous LAE at z > 6.5, with M1500 = −22.5, even brighter in the UV than CR7. Besides Ly α, we do not detect any other rest-frame UV lines in the spectra of SR6 and VR7, and argue that rest-frame UV lines are easier to observe in bright galaxies with low Ly α equivalent widths. We confirm that Ly α line widths increase with Ly α luminosity at z = 5.7, while there are indications that Ly α lines of faint LAEs become broader at z = 6.6, potentially due to reionization. We find a large spread of up to 3 dex in UV luminosity for >L⋆ LAEs, but find that the Ly α luminosity of the brightest LAEs is strongly related to UV luminosity at z = 6.6. Under basic assumptions, we find that several LAEs at z ≈ 6–7 have Ly α escape fractions ≳ 100  per cent, indicating bursty star formation histories, alternative Ly α production mechanisms, or dust attenuating Ly α emission differently than UV emission. Finally, we present a method to compute ξion, the production efficiency of ionizing photons, and find that LAEs at z ≈ 6–7 have high values of log10(ξion/Hz erg−1) ≈ 25.51 ± 0.09 that may alleviate the need for high Lyman-Continuum escape fractions required for reionization."}],"date_published":"2017-11-01T00:00:00Z","author":[{"last_name":"Matthee","orcid":"0000-0003-2871-127X","id":"7439a258-f3c0-11ec-9501-9df22fe06720","first_name":"Jorryt J","full_name":"Matthee, Jorryt J"},{"last_name":"Sobral","full_name":"Sobral, David","first_name":"David"},{"last_name":"Darvish","full_name":"Darvish, Behnam","first_name":"Behnam"},{"full_name":"Santos, Sérgio","first_name":"Sérgio","last_name":"Santos"},{"full_name":"Mobasher, Bahram","first_name":"Bahram","last_name":"Mobasher"},{"last_name":"Paulino-Afonso","first_name":"Ana","full_name":"Paulino-Afonso, Ana"},{"first_name":"Huub","full_name":"Röttgering, Huub","last_name":"Röttgering"},{"last_name":"Alegre","first_name":"Lara","full_name":"Alegre, Lara"}],"publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"oa":1,"keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution – galaxies: high-redshift","dark ages","reionization","first stars","cosmology: observations"],"publication":"Monthly Notices of the Royal Astronomical Society","external_id":{"arxiv":["1706.06591"]},"title":"Spectroscopic properties of luminous Ly α emitters at z ≈ 6–7 and comparison to the Lyman-break population","acknowledgement":"We thank the referee for a constructive report that has improved the quality and clarity of this work. The authors thank Grecco Oyarzún for discussions. JM acknowledges the support of a Huygens PhD fellowship from Leiden University. DS acknowledges financial support from the Netherlands Organisation for Scientific research (NWO) through a Veni fellowship and from Lancaster University through an Early Career Internal Grant A100679. BD acknowledges financial support from NASA through the Astrophysics Data Analysis Program (ADAP), grant number NNX12AE20G. We thank Kasper Schmidt for providing measurements. Based on observations with the W.M. Keck Observatory through programme C267D. The W.M. Keck Observatory is operated as a scientific partnership amongst the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 097.A-0943, 294.A 5018 and 098.A-0819 and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium. The authors acknowledge the award of observing time (W16AN004) and of service time (SW2014b20) on the William Herschel Telescope (WHT). WHT and its service programme are operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. Based on observations made with the NASA/ESA HST, obtained (from the Data Archive) at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programme #14699. We are grateful for the excellent data sets from the COSMOS, UltraVISTA, SXDS, UDS and CFHTLS survey teams; without these legacy surveys, this research would have been impossible. We have benefited from the public available programming language PYTHON, including the NUMPY, MATPLOTLIB, PYFITS, SCIPY and ASTROPY packages, the astronomical imaging tools SEXTRACTOR, SWARP and SCAMP and the TOPCAT analysis tool (Taylor 2013).","extern":"1","language":[{"iso":"eng"}],"arxiv":1,"issue":"1"},{"abstract":[{"text":"We present dynamical measurements from the KMOS (K-band multi-object spectrograph) Deep Survey (KDS), which comprises 77 typical star-forming galaxies at z ≃ 3.5 in the mass range 9.0 < log (M⋆/M⊙) < 10.5. These measurements constrain the internal dynamics, the intrinsic velocity dispersions (σint) and rotation velocities (VC) of galaxies in the high-redshift Universe. The mean velocity dispersion of the galaxies in our sample is σint=70.8+3.3−3.1kms−1⁠, revealing that the increasing average σint with increasing redshift, reported for z ≲ 2, continues out to z ≃ 3.5. Only 36 ± 8 per cent of our galaxies are rotation-dominated (VC/σint > 1), with the sample average VC/σint value much smaller than at lower redshift. After carefully selecting comparable star-forming samples at multiple epochs, we find that the rotation-dominated fraction evolves with redshift with a z−0.2 dependence. The rotation-dominated KDS galaxies show no clear offset from the local rotation velocity–stellar mass (i.e. VC–M⋆) relation, although a smaller fraction of the galaxies are on the relation due to the increase in the dispersion-dominated fraction. These observations are consistent with a simple equilibrium model picture, in which random motions are boosted in high-redshift galaxies by a combination of the increasing gas fractions, accretion efficiency, specific star formation rate and stellar feedback and which may provide significant pressure support against gravity on the galactic disc scale.","lang":"eng"}],"page":"1280-1320","date_published":"2017-10-01T00:00:00Z","author":[{"full_name":"Turner, O. J.","first_name":"O. J.","last_name":"Turner"},{"first_name":"M.","full_name":"Cirasuolo, M.","last_name":"Cirasuolo"},{"first_name":"C. M.","full_name":"Harrison, C. M.","last_name":"Harrison"},{"last_name":"McLure","first_name":"R. J.","full_name":"McLure, R. J."},{"last_name":"Dunlop","first_name":"J. S.","full_name":"Dunlop, J. S."},{"last_name":"Swinbank","first_name":"A. M.","full_name":"Swinbank, A. M."},{"last_name":"Johnson","full_name":"Johnson, H. L.","first_name":"H. L."},{"last_name":"Sobral","full_name":"Sobral, D.","first_name":"D."},{"id":"7439a258-f3c0-11ec-9501-9df22fe06720","orcid":"0000-0003-2871-127X","last_name":"Matthee","full_name":"Matthee, Jorryt J","first_name":"Jorryt J"},{"last_name":"Sharples","first_name":"R. M.","full_name":"Sharples, R. M."}],"oa":1,"publication_identifier":{"eissn":["1365-2966"],"issn":["0035-8711"]},"publication":"Monthly Notices of the Royal Astronomical Society","keyword":["Space and Planetary Science","Astronomy and Astrophysics","galaxies: evolution","galaxies: high-redshift","galaxies: kinematics and dynamics"],"title":"The KMOS Deep Survey (KDS) – I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5","external_id":{"arxiv":["1704.06263"]},"extern":"1","acknowledgement":"We wish to thank the anonymous referee for their comments, which have improved the quality and clarity of this work. OJT acknowledges the financial support of the Science and Technology Facilities Council through a studentship award. MC and OJT acknowledge the KMOS team and all the personnel of the European Southern Observatory Very Large Telescope for outstanding support during the KMOS GTO observations. CMH, AMS and RMS acknowledge the Science and Technology Facilities Council through grant code ST/L00075X/1. RJM acknowledges the support of the European Research Council via the award of a Consolidator Grant (PI: McLure). JSD acknowledges the support of the European Research Council via the award of an Advanced Grant (PI J. Dunlop), and the contribution of the EC FP7 SPACE project ASTRODEEP (Ref.No: 312725). AMS acknowledges the Leverhulme Foundation. JM acknowledges the support of a Huygens PhD fellowship from Leiden University. DS acknowledges financial support from the Netherlands Organization for Scientific research (NWO) through a Veni fellowship and from FCT through an FCT Investigator Starting Grant and Start-up Grant (IF/01154/2012/CP0189/CT0010). This work is based on observations taken by the CANDELS Multi-Cycle Treasury Program with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work is based on observations taken by the 3D HST Treasury Program (GO 12177 and 12328) with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Program 185.A-0791, and made available by the VUDS team at the CESAM data centre, Laboratoire d’Astrophysique de Marseille, France. Based on observations obtained at the Very Large Telescope of the European Southern Observatory. Programme IDs: 092.A 0399(A), 093.A-0122(A,B), 094.A-0214(A,B),095.A0680(A,B),096.A-0315(A,B,C).","language":[{"iso":"eng"}],"arxiv":1,"issue":"2","article_processing_charge":"No","publication_status":"published","publisher":"Oxford University Press","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2022-08-19T08:07:31Z","oa_version":"Preprint","_id":"11573","month":"10","main_file_link":[{"url":"https://arxiv.org/abs/1704.06263","open_access":"1"}],"quality_controlled":"1","day":"01","volume":471,"scopus_import":"1","type":"journal_article","intvolume":"       471","citation":{"mla":"Turner, O. J., et al. “The KMOS Deep Survey (KDS) – I. Dynamical Measurements of Typical Star-Forming Galaxies at z ≃ 3.5.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 2, Oxford University Press, 2017, pp. 1280–320, doi:<a href=\"https://doi.org/10.1093/mnras/stx1366\">10.1093/mnras/stx1366</a>.","chicago":"Turner, O. J., M. Cirasuolo, C. M. Harrison, R. J. McLure, J. S. Dunlop, A. M. Swinbank, H. L. Johnson, D. Sobral, Jorryt J Matthee, and R. M. Sharples. “The KMOS Deep Survey (KDS) – I. Dynamical Measurements of Typical Star-Forming Galaxies at z ≃ 3.5.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2017. <a href=\"https://doi.org/10.1093/mnras/stx1366\">https://doi.org/10.1093/mnras/stx1366</a>.","apa":"Turner, O. J., Cirasuolo, M., Harrison, C. M., McLure, R. J., Dunlop, J. S., Swinbank, A. M., … Sharples, R. M. (2017). The KMOS Deep Survey (KDS) – I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx1366\">https://doi.org/10.1093/mnras/stx1366</a>","ista":"Turner OJ, Cirasuolo M, Harrison CM, McLure RJ, Dunlop JS, Swinbank AM, Johnson HL, Sobral D, Matthee JJ, Sharples RM. 2017. The KMOS Deep Survey (KDS) – I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5. Monthly Notices of the Royal Astronomical Society. 471(2), 1280–1320.","short":"O.J. Turner, M. Cirasuolo, C.M. Harrison, R.J. McLure, J.S. Dunlop, A.M. Swinbank, H.L. Johnson, D. Sobral, J.J. Matthee, R.M. Sharples, Monthly Notices of the Royal Astronomical Society 471 (2017) 1280–1320.","ieee":"O. J. Turner <i>et al.</i>, “The KMOS Deep Survey (KDS) – I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 471, no. 2. Oxford University Press, pp. 1280–1320, 2017.","ama":"Turner OJ, Cirasuolo M, Harrison CM, et al. The KMOS Deep Survey (KDS) – I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5. <i>Monthly Notices of the Royal Astronomical Society</i>. 2017;471(2):1280-1320. doi:<a href=\"https://doi.org/10.1093/mnras/stx1366\">10.1093/mnras/stx1366</a>"},"date_created":"2022-07-13T10:03:01Z","status":"public","article_type":"original","year":"2017","doi":"10.1093/mnras/stx1366"},{"volume":173,"day":"01","project":[{"_id":"25716A02-B435-11E9-9278-68D0E5697425","name":"Polarity and subcellular dynamics in plants","call_identifier":"FP7","grant_number":"282300"}],"type":"journal_article","scopus_import":"1","status":"public","article_type":"original","year":"2017","intvolume":"       173","citation":{"apa":"Steenackers, W., Klíma, P., Quareshy, M., Cesarino, I., Kumpf, R., Corneillie, S., … Vanholme, B. (2017). Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral root formation. <i>Plant Physiology</i>. American Society of Plant Biologists. <a href=\"https://doi.org/10.1104/pp.16.00943\">https://doi.org/10.1104/pp.16.00943</a>","chicago":"Steenackers, Ward, Petr Klíma, Mussa Quareshy, Igor Cesarino, Robert Kumpf, Sander Corneillie, Pedro Araújo, et al. “Cis-Cinnamic Acid Is a Novel Natural Auxin Efflux Inhibitor That Promotes Lateral Root Formation.” <i>Plant Physiology</i>. American Society of Plant Biologists, 2017. <a href=\"https://doi.org/10.1104/pp.16.00943\">https://doi.org/10.1104/pp.16.00943</a>.","mla":"Steenackers, Ward, et al. “Cis-Cinnamic Acid Is a Novel Natural Auxin Efflux Inhibitor That Promotes Lateral Root Formation.” <i>Plant Physiology</i>, vol. 173, no. 1, American Society of Plant Biologists, 2017, pp. 552–65, doi:<a href=\"https://doi.org/10.1104/pp.16.00943\">10.1104/pp.16.00943</a>.","ieee":"W. Steenackers <i>et al.</i>, “Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral root formation,” <i>Plant Physiology</i>, vol. 173, no. 1. American Society of Plant Biologists, pp. 552–565, 2017.","ama":"Steenackers W, Klíma P, Quareshy M, et al. Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral root formation. <i>Plant Physiology</i>. 2017;173(1):552-565. doi:<a href=\"https://doi.org/10.1104/pp.16.00943\">10.1104/pp.16.00943</a>","ista":"Steenackers W, Klíma P, Quareshy M, Cesarino I, Kumpf R, Corneillie S, Araújo P, Viaene T, Goeminne G, Nowack M, Ljung K, Friml J, Blakeslee J, Novák O, Zažímalová E, Napier R, Boerjan W, Vanholme B. 2017. Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral root formation. Plant Physiology. 173(1), 552–565.","short":"W. Steenackers, P. Klíma, M. Quareshy, I. Cesarino, R. Kumpf, S. Corneillie, P. Araújo, T. Viaene, G. Goeminne, M. Nowack, K. Ljung, J. Friml, J. Blakeslee, O. Novák, E. Zažímalová, R. Napier, W. Boerjan, B. Vanholme, Plant Physiology 173 (2017) 552–565."},"date_created":"2018-12-11T11:50:28Z","doi":"10.1104/pp.16.00943","isi":1,"publisher":"American Society of Plant Biologists","article_processing_charge":"No","publication_status":"published","_id":"1159","date_updated":"2025-04-15T07:48:02Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","oa_version":"Submitted Version","month":"01","publist_id":"6199","department":[{"_id":"JiFr"}],"quality_controlled":"1","file_date_updated":"2020-07-14T12:44:36Z","language":[{"iso":"eng"}],"file":[{"date_updated":"2020-07-14T12:44:36Z","relation":"main_file","file_name":"2016_PlantPhysi_Steenackers.pdf","creator":"dernst","content_type":"application/pdf","file_id":"7040","checksum":"fd4d1cfe7ed70e54bb12ae3881f3fb91","file_size":4109142,"date_created":"2019-11-18T16:12:25Z","access_level":"open_access"}],"issue":"1","has_accepted_license":"1","ddc":["580"],"abstract":[{"lang":"eng","text":"Auxin steers numerous physiological processes in plants, making the tight control of its endogenous levels and spatiotemporal distribution a necessity. This regulation is achieved by different mechanisms, including auxin biosynthesis, metabolic conversions, degradation, and transport. Here, we introduce cis-cinnamic acid (c-CA) as a novel and unique addition to a small group of endogenous molecules affecting in planta auxin concentrations. c-CA is the photo-isomerization product of the phenylpropanoid pathway intermediate trans-CA (t-CA). When grown on c-CA-containing medium, an evolutionary diverse set of plant species were shown to exhibit phenotypes characteristic for high auxin levels, including inhibition of primary root growth, induction of root hairs, and promotion of adventitious and lateral rooting. By molecular docking and receptor binding assays, we showed that c-CA itself is neither an auxin nor an anti-auxin, and auxin profiling data revealed that c-CA does not significantly interfere with auxin biosynthesis. Single cell-based auxin accumulation assays showed that c-CA, and not t-CA, is a potent inhibitor of auxin efflux. Auxin signaling reporters detected changes in spatiotemporal distribution of the auxin response along the root of c-CA-treated plants, and long-distance auxin transport assays showed no inhibition of rootward auxin transport. Overall, these results suggest that the phenotypes of c-CA-treated plants are the consequence of a local change in auxin accumulation, induced by the inhibition of auxin efflux. This work reveals a novel mechanism how plants may regulate auxin levels and adds a novel, naturally occurring molecule to the chemical toolbox for the studies of auxin homeostasis."}],"page":"552 - 565","date_published":"2017-01-01T00:00:00Z","author":[{"last_name":"Steenackers","full_name":"Steenackers, Ward","first_name":"Ward"},{"last_name":"Klíma","full_name":"Klíma, Petr","first_name":"Petr"},{"last_name":"Quareshy","full_name":"Quareshy, Mussa","first_name":"Mussa"},{"full_name":"Cesarino, Igor","first_name":"Igor","last_name":"Cesarino"},{"last_name":"Kumpf","full_name":"Kumpf, Robert","first_name":"Robert"},{"first_name":"Sander","full_name":"Corneillie, Sander","last_name":"Corneillie"},{"full_name":"Araújo, Pedro","first_name":"Pedro","last_name":"Araújo"},{"first_name":"Tom","full_name":"Viaene, Tom","last_name":"Viaene"},{"full_name":"Goeminne, Geert","first_name":"Geert","last_name":"Goeminne"},{"last_name":"Nowack","full_name":"Nowack, Moritz","first_name":"Moritz"},{"last_name":"Ljung","full_name":"Ljung, Karin","first_name":"Karin"},{"orcid":"0000-0002-8302-7596","id":"4159519E-F248-11E8-B48F-1D18A9856A87","last_name":"Friml","full_name":"Friml, Jirí","first_name":"Jirí"},{"last_name":"Blakeslee","first_name":"Joshua","full_name":"Blakeslee, Joshua"},{"last_name":"Novák","full_name":"Novák, Ondřej","first_name":"Ondřej"},{"last_name":"Zažímalová","first_name":"Eva","full_name":"Zažímalová, Eva"},{"last_name":"Napier","first_name":"Richard","full_name":"Napier, Richard"},{"full_name":"Boerjan, Wout","first_name":"Wout","last_name":"Boerjan"},{"full_name":"Vanholme, Bartel","first_name":"Bartel","last_name":"Vanholme"}],"publication_identifier":{"issn":["0032-0889"]},"oa":1,"pmid":1,"publication":"Plant Physiology","ec_funded":1,"external_id":{"isi":["000394135800041"],"pmid":["27837086"]},"title":"Cis-cinnamic acid is a novel natural auxin efflux inhibitor that promotes lateral root formation"},{"quality_controlled":"1","month":"01","publist_id":"6198","department":[{"_id":"BjHo"}],"_id":"1160","date_updated":"2025-07-10T11:50:13Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Published Version","pubrep_id":"743","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"isi":1,"publisher":"Nature Publishing Group","article_processing_charge":"No","publication_status":"published","doi":"10.1038/srep40012","status":"public","year":"2017","intvolume":"         7","citation":{"ista":"Altmeyer S, Do Y, Lai Y. 2017. Dynamics of ferrofluidic flow in the Taylor-Couette system with a small aspect ratio. Scientific Reports. 7, 40012.","short":"S. Altmeyer, Y. Do, Y. Lai, Scientific Reports 7 (2017).","ama":"Altmeyer S, Do Y, Lai Y. Dynamics of ferrofluidic flow in the Taylor-Couette system with a small aspect ratio. <i>Scientific Reports</i>. 2017;7. doi:<a href=\"https://doi.org/10.1038/srep40012\">10.1038/srep40012</a>","ieee":"S. Altmeyer, Y. Do, and Y. Lai, “Dynamics of ferrofluidic flow in the Taylor-Couette system with a small aspect ratio,” <i>Scientific Reports</i>, vol. 7. Nature Publishing Group, 2017.","chicago":"Altmeyer, Sebastian, Younghae Do, and Ying Lai. “Dynamics of Ferrofluidic Flow in the Taylor-Couette System with a Small Aspect Ratio.” <i>Scientific Reports</i>. Nature Publishing Group, 2017. <a href=\"https://doi.org/10.1038/srep40012\">https://doi.org/10.1038/srep40012</a>.","mla":"Altmeyer, Sebastian, et al. “Dynamics of Ferrofluidic Flow in the Taylor-Couette System with a Small Aspect Ratio.” <i>Scientific Reports</i>, vol. 7, 40012, Nature Publishing Group, 2017, doi:<a href=\"https://doi.org/10.1038/srep40012\">10.1038/srep40012</a>.","apa":"Altmeyer, S., Do, Y., &#38; Lai, Y. (2017). Dynamics of ferrofluidic flow in the Taylor-Couette system with a small aspect ratio. <i>Scientific Reports</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/srep40012\">https://doi.org/10.1038/srep40012</a>"},"date_created":"2018-12-11T11:50:28Z","type":"journal_article","scopus_import":"1","volume":7,"day":"06","external_id":{"isi":["000391269700001"]},"title":"Dynamics of ferrofluidic flow in the Taylor-Couette system with a small aspect ratio","publication":"Scientific Reports","publication_identifier":{"issn":["2045-2322"]},"oa":1,"ddc":["532"],"abstract":[{"lang":"eng","text":"We investigate fundamental nonlinear dynamics of ferrofluidic Taylor-Couette flow - flow confined be-tween two concentric independently rotating cylinders - consider small aspect ratio by solving the ferro-hydrodynamical equations, carrying out systematic bifurcation analysis. Without magnetic field, we find steady flow patterns, previously observed with a simple fluid, such as those containing normal one- or two vortex cells, as well as anomalous one-cell and twin-cell flow states. However, when a symmetry-breaking transverse magnetic field is present, all flow states exhibit stimulated, finite two-fold mode. Various bifurcations between steady and unsteady states can occur, corresponding to the transitions between the two-cell and one-cell states. While unsteady, axially oscillating flow states can arise, we also detect the emergence of new unsteady flow states. In particular, we uncover two new states: one contains only the azimuthally oscillating solution in the configuration of the twin-cell flow state, and an-other a rotating flow state. Topologically, these flow states are a limit cycle and a quasiperiodic solution on a two-torus, respectively. Emergence of new flow states in addition to observed ones with classical fluid, indicates that richer but potentially more controllable dynamics in ferrofluidic flows, as such flow states depend on the external magnetic field."}],"date_published":"2017-01-06T00:00:00Z","author":[{"orcid":"0000-0001-5964-0203","id":"2EE67FDC-F248-11E8-B48F-1D18A9856A87","last_name":"Altmeyer","full_name":"Altmeyer, Sebastian","first_name":"Sebastian"},{"first_name":"Younghae","full_name":"Do, Younghae","last_name":"Do"},{"last_name":"Lai","full_name":"Lai, Ying","first_name":"Ying"}],"has_accepted_license":"1","language":[{"iso":"eng"}],"file":[{"date_updated":"2020-07-14T12:44:36Z","file_name":"IST-2017-743-v1+1_srep40012.pdf","relation":"main_file","content_type":"application/pdf","creator":"system","file_id":"4802","checksum":"694aa70399444570825099c1a7ec91f2","access_level":"open_access","file_size":4546835,"date_created":"2018-12-12T10:10:16Z"}],"article_number":"40012","file_date_updated":"2020-07-14T12:44:36Z"},{"doi":"10.1016/j.cub.2016.11.035","date_created":"2018-12-11T11:50:29Z","citation":{"apa":"Müller, J., &#38; Sixt, M. K. (2017). Cell migration: Making the waves. <i>Current Biology</i>. Cell Press. <a href=\"https://doi.org/10.1016/j.cub.2016.11.035\">https://doi.org/10.1016/j.cub.2016.11.035</a>","mla":"Müller, Jan, and Michael K. Sixt. “Cell Migration: Making the Waves.” <i>Current Biology</i>, vol. 27, no. 1, Cell Press, 2017, pp. R24–25, doi:<a href=\"https://doi.org/10.1016/j.cub.2016.11.035\">10.1016/j.cub.2016.11.035</a>.","chicago":"Müller, Jan, and Michael K Sixt. “Cell Migration: Making the Waves.” <i>Current Biology</i>. Cell Press, 2017. <a href=\"https://doi.org/10.1016/j.cub.2016.11.035\">https://doi.org/10.1016/j.cub.2016.11.035</a>.","ieee":"J. Müller and M. K. Sixt, “Cell migration: Making the waves,” <i>Current Biology</i>, vol. 27, no. 1. Cell Press, pp. R24–R25, 2017.","ama":"Müller J, Sixt MK. Cell migration: Making the waves. <i>Current Biology</i>. 2017;27(1):R24-R25. doi:<a href=\"https://doi.org/10.1016/j.cub.2016.11.035\">10.1016/j.cub.2016.11.035</a>","short":"J. Müller, M.K. Sixt, Current Biology 27 (2017) R24–R25.","ista":"Müller J, Sixt MK. 2017. Cell migration: Making the waves. Current Biology. 27(1), R24–R25."},"intvolume":"        27","article_type":"letter_note","year":"2017","status":"public","scopus_import":"1","OA_type":"free access","type":"journal_article","day":"09","volume":27,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1016/j.cub.2016.11.035"}],"quality_controlled":"1","department":[{"_id":"MiSi"}],"publist_id":"6197","month":"01","oa_version":"Published Version","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2025-06-26T09:01:10Z","_id":"1161","article_processing_charge":"No","publication_status":"published","isi":1,"publisher":"Cell Press","issue":"1","language":[{"iso":"eng"}],"title":"Cell migration: Making the waves","external_id":{"isi":["000391902500010"]},"publication":"Current Biology","oa":1,"publication_identifier":{"issn":["09609822"]},"author":[{"first_name":"Jan","full_name":"Müller, Jan","last_name":"Müller","id":"AD07FDB4-0F61-11EA-8158-C4CC64CEAA8D"},{"orcid":"0000-0002-6620-9179","id":"41E9FBEA-F248-11E8-B48F-1D18A9856A87","last_name":"Sixt","full_name":"Sixt, Michael K","first_name":"Michael K"}],"date_published":"2017-01-09T00:00:00Z","abstract":[{"text":"Coordinated changes of cell shape are often the result of the excitable, wave-like dynamics of the actin cytoskeleton. New work shows that, in migrating cells, protrusion waves arise from mechanochemical crosstalk between adhesion sites, membrane tension and the actin protrusive machinery.","lang":"eng"}],"page":"R24 - R25","OA_place":"publisher"}]
