{"has_accepted_license":"1","OA_type":"hybrid","language":[{"iso":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","tmp":{"image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/3.0/legalcode","short":"CC BY (3.0)","name":"Creative Commons Attribution 3.0 Unported (CC BY 3.0)"},"oa":1,"publication":"Publications of the Astronomical Society of the Pacific","acknowledgement":"We thank the referee for their constructive comments. We also thank Jim Fuller and Stefan Geier for helpful discussions. The Kavli Institute for Theoretical Physics (KITP) hosted the program, \"White Dwarfs as Probes of the Evolution of Planets, Stars, the Milky Way, and the Expanding Universe,\" during which this project was initiated.\r\n\r\nThis research was supported in part by the U.S. National Science Foundation (NSF) grant AST-2307232, and in part by grants PHY-1748958 and AST-2107070.\r\n\r\nThis work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.\r\n\r\nThis work is based in part on observations obtained with the Samuel Oschin 48 inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the NSF under grant AST-1440341 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, the University of Washington, Deutsches Elektronen-Synchrotron and Humboldt University, Los Alamos National Laboratories, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, and the Lawrence Berkeley National Laboratory. Operations are conducted by the Caltech Optical Observatories (COO), the Infrared Processing and Analysis Center (IPAC), and the University of Washington (UW).\r\n\r\nSome of the data presented herein were obtained at Keck Observatory, which is a private 501(c)3 non-profit organization operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.","file":[{"success":1,"file_id":"18719","file_size":7539133,"date_created":"2025-01-02T09:34:25Z","creator":"dernst","content_type":"application/pdf","access_level":"open_access","date_updated":"2025-01-02T09:34:25Z","checksum":"56fe719e26bc0c2a99ac5322791107e5","file_name":"2024_PASP_Blomberg.pdf","relation":"main_file"}],"doi":"10.1088/1538-3873/ad94a2","quality_controlled":"1","OA_place":"publisher","ddc":["520"],"arxiv":1,"intvolume":"       136","date_updated":"2025-01-02T09:36:21Z","publication_identifier":{"issn":["0004-6280"]},"date_published":"2024-12-01T00:00:00Z","type":"journal_article","status":"public","abstract":[{"text":"We measure the mass distribution of main-sequence (MS) companions to hot subdwarf B stars (sdBs) in post-common envelope binaries (PCEBs). We carried out a spectroscopic survey of 14 eclipsing systems (\"HW Vir binaries\") with orbital periods of 3.8 < Porb < 12 hr, resulting in a well-understood selection function and a near-complete sample of HW Vir binaries with G < 16. We constrain companion masses from the radial velocity curves of the sdB stars. The companion mass distribution peaks at MMS ≈ 0.15 M⊙ and drops off at MMS > 0.2 M⊙, with only two systems hosting companions above the fully convective limit. There is no correlation between Porb and MMS within the sample. A similar drop-off in the companion mass distribution of white dwarf (WD) + MS PCEBs has been attributed to disrupted magnetic braking (MB) below the fully convective limit. We compare the sdB companion mass distribution to predictions of binary evolution simulations with a range of MB laws. Because sdBs have short lifetimes compared to WDs, explaining the lack of higher-mass MS companions to sdBs with disrupted MB requires MB to be boosted by a factor of 20–100 relative to MB laws inferred from the rotation evolution of single stars. We speculate that such boosting may be a result of irradiation-driven enhancement of the MS stars' winds. An alternative possibility is that common envelope evolution favors low-mass companions in short-period orbits, but the existence of massive WD companions to sdBs with similar periods disfavors this scenario.","lang":"eng"}],"title":"The companion mass distribution of post common envelope hot subdwarf binaries: Evidence for boosted and disrupted magnetic braking?","file_date_updated":"2025-01-02T09:34:25Z","article_processing_charge":"No","article_type":"original","article_number":"124201","external_id":{"arxiv":["2408.15334"]},"volume":136,"year":"2024","citation":{"ista":"Blomberg L, El-Badry K, Breivik K, Caiazzo I, Nagarajan P, Rodriguez A, Van Roestel J, Vanderbosch ZP, Yamaguchi N. 2024. The companion mass distribution of post common envelope hot subdwarf binaries: Evidence for boosted and disrupted magnetic braking? Publications of the Astronomical Society of the Pacific. 136(12), 124201.","ama":"Blomberg L, El-Badry K, Breivik K, et al. The companion mass distribution of post common envelope hot subdwarf binaries: Evidence for boosted and disrupted magnetic braking? <i>Publications of the Astronomical Society of the Pacific</i>. 2024;136(12). doi:<a href=\"https://doi.org/10.1088/1538-3873/ad94a2\">10.1088/1538-3873/ad94a2</a>","chicago":"Blomberg, Lisa, Kareem El-Badry, Katelyn Breivik, Ilaria Caiazzo, Pranav Nagarajan, Antonio Rodriguez, Jan Van Roestel, Zachary P. Vanderbosch, and Natsuko Yamaguchi. “The Companion Mass Distribution of Post Common Envelope Hot Subdwarf Binaries: Evidence for Boosted and Disrupted Magnetic Braking?” <i>Publications of the Astronomical Society of the Pacific</i>. IOP Publishing, 2024. <a href=\"https://doi.org/10.1088/1538-3873/ad94a2\">https://doi.org/10.1088/1538-3873/ad94a2</a>.","mla":"Blomberg, Lisa, et al. “The Companion Mass Distribution of Post Common Envelope Hot Subdwarf Binaries: Evidence for Boosted and Disrupted Magnetic Braking?” <i>Publications of the Astronomical Society of the Pacific</i>, vol. 136, no. 12, 124201, IOP Publishing, 2024, doi:<a href=\"https://doi.org/10.1088/1538-3873/ad94a2\">10.1088/1538-3873/ad94a2</a>.","apa":"Blomberg, L., El-Badry, K., Breivik, K., Caiazzo, I., Nagarajan, P., Rodriguez, A., … Yamaguchi, N. (2024). The companion mass distribution of post common envelope hot subdwarf binaries: Evidence for boosted and disrupted magnetic braking? <i>Publications of the Astronomical Society of the Pacific</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1538-3873/ad94a2\">https://doi.org/10.1088/1538-3873/ad94a2</a>","short":"L. Blomberg, K. El-Badry, K. Breivik, I. Caiazzo, P. Nagarajan, A. Rodriguez, J. Van Roestel, Z.P. Vanderbosch, N. Yamaguchi, Publications of the Astronomical Society of the Pacific 136 (2024).","ieee":"L. Blomberg <i>et al.</i>, “The companion mass distribution of post common envelope hot subdwarf binaries: Evidence for boosted and disrupted magnetic braking?,” <i>Publications of the Astronomical Society of the Pacific</i>, vol. 136, no. 12. IOP Publishing, 2024."},"date_created":"2024-12-29T23:01:57Z","_id":"18709","scopus_import":"1","day":"01","department":[{"_id":"IlCa"}],"month":"12","issue":"12","publisher":"IOP Publishing","author":[{"first_name":"Lisa","full_name":"Blomberg, Lisa","last_name":"Blomberg"},{"first_name":"Kareem","full_name":"El-Badry, Kareem","last_name":"El-Badry"},{"full_name":"Breivik, Katelyn","last_name":"Breivik","first_name":"Katelyn"},{"first_name":"Ilaria","full_name":"Caiazzo, Ilaria","orcid":"0000-0002-4770-5388","last_name":"Caiazzo","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d"},{"last_name":"Nagarajan","full_name":"Nagarajan, Pranav","first_name":"Pranav"},{"last_name":"Rodriguez","full_name":"Rodriguez, Antonio","first_name":"Antonio"},{"full_name":"Van Roestel, Jan","last_name":"Van Roestel","first_name":"Jan"},{"first_name":"Zachary P.","last_name":"Vanderbosch","full_name":"Vanderbosch, Zachary P."},{"first_name":"Natsuko","full_name":"Yamaguchi, Natsuko","last_name":"Yamaguchi"}],"oa_version":"Published Version"}