{"paper":{"title":"PTF1 J082340.04+081936.5: A hot subdwarf B star with a low mass white dwarf companion in an 87 minute orbit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(10) University of Sheffield, 11), (11) Instituto de Astrofsica de Canarias, 12), (12) National Astronomical Research Institute of Thailand, (13) Spitzer Science Center, (14) Infrared Processing, (15) University of Cambridge), ((1) California Institute of Technology, (2) Radboud University Nijmegen, (3) University of California, (4) University of Tuebingen, (5) University of Warwick, (6) University of Erlangen-Nuremberg, 7), (7) Kavli Institute for Theoretical Physics, (8) Northwestern University, 9), (9) The Adler Planetarium, Adam A. Miller (8, Analysis Center, Caltech, Charles C. Steidel (1), David L. Shupe (14), Eric Bellm (1), Jan van Roestel (2), Jared Brooks (3), Lars Bildsten (3, Martin J. Dyer (10), Matthew Green (5), Max Pettini (15), Paul J. Groot (2), Puji Irawati (12), Russ Laher (13), Santa Barbara, Somsawat Rattansoon (10, Stephan Geier (4), Steven Bloemen (2), Stuart P. Littlefair (10), Thomas A. Prince (1), Thomas Kupfer (1), Tom R. Marsh (5), Ulrich Heber (6), Vik S. Dhillon (10","submitted_at":"2016-12-06T21:03:51Z","abstract_excerpt":"We present the discovery of the hot subdwarf B star (sdB) binary PTF1 J082340.04+081936.5. The system has an orbital period P$_{\\rm orb}=87.49668(1)$ min (0.060761584(10) days), making it the second-most compact sdB binary known. The lightcurve shows ellipsoidal variations. Under the assumption that the sdB primary is synchronized with the orbit, we find a mass $M_{\\rm sdB}=0.45^{+0.09}_{-0.07}$ M$_\\odot$, a companion white dwarf mass $M_{\\rm WD}=0.46^{+0.12}_{-0.09}$ M$_\\odot$ and a mass ratio $q = \\frac{M_{\\rm WD}}{M_{\\rm sdB}}=1.03^{+0.10}_{-0.08}$.\n  The future evolution was calculated usi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.02019","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}