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The orbit and stellar masses of the archetype colliding-wind binary WR 140We present updated orbital elements for the Wolf–Rayet (WR) binary WR 140 (HD 193793; WC7pd + O5.5fc). The new orbital elements were derived using previously published measurements along with 160 new radial velocity measurements across the 2016 periastron passage of WR 140. Additionally, four new measurements of the orbital astrometry were collected with the CHARA Array. With these measurements, we derive stellar masses of M(WR)=10.31±0.45Mꙩ and M(O)=29.27±1.14Mꙩ⁠. We also include a discussion of the evolutionary history of this system from the Binary Population and Spectral Synthesis model grid to show that this WR star likely formed primarily through mass-loss in the stellar winds, with only a moderate amount of mass lost or transferred through binary interactions.
Document ID
20210026146
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Joshua D. Thomas ORCID
(Clarkson University Potsdam, New York, United States)
Noel D. Richardson ORCID
(Embry–Riddle Aeronautical University Daytona Beach, Florida, United States)
J. J. Eldridge ORCID
(University of Auckland Auckland, New Zealand)
Gail H. Schaefer
(Mount Wilson Observatory Los Angeles, California, United States)
John D. Monnier
(University of Michigan–Ann Arbor Ann Arbor, Michigan, United States)
Hugues Sana ORCID
(KU Leuven Leuven, Belgium)
Anthony F. J. Moffat
(Centre for Research in Astrophysics of Québec Montreal, Quebec, Canada)
Peredur Williams ORCID
(University of Edinburgh Edinburgh, United Kingdom)
Michael F Corcoran
(Universities Space Research Association Columbia, Maryland, United States)
Ian R. Stevens ORCID
(University of Birmingham Birmingham, United Kingdom)
Gerd Weigelt
(Max Planck Institute for Radio Astronomy Bonn, Germany)
Farrah D. Zainol
(University of Birmingham Birmingham, United Kingdom)
Narsireddy Anugu
(University of Exeter Exeter, United Kingdom)
Jean-Baptiste Le Bouquin
(Institut de Planétologie et d'Astrophysique de Grenoble Grenoble, France)
Theo ten Brummelaar
(Mount Wilson Observatory Los Angeles, California, United States)
Fran Campos
(Observatori Puig d'Agulles)
Andrew Couperus
(Clarkson University Potsdam, New York, United States)
Claire L. Davies ORCID
(University of Exeter Exeter, United Kingdom)
Jacob Ennis
(University of Michigan–Ann Arbor Ann Arbor, Michigan, United States)
Thomas Eversberg
(Schnörringen Telescope Science Institute Waldbröl, Germany)
Oliver Garde
(Observatoire de la Tourbiere)
Tyler Gardner
(University of Michigan–Ann Arbor Ann Arbor, Michigan, United States)
Joan Guarro Flo
(Balmes 2, E-08784 Piera, Barcelona, Spain)
Stefan Kraus
(University of Exeter Exeter, United Kingdom)
Aaron Labdon
(University of Exeter Exeter, United Kingdom)
Cyprien Lanthermann
(KU Leuven Leuven, Belgium)
Robin Leadbeater
(The Birches Torpenhow, Wigton, Cumbria CA7 1JF, UK)
T. Lester
(1178 Mill Ridge Road, Arnprior, ON K7S3G8, Canada)
Courtney Maki
(Clarkson University Potsdam, New York, United States)
Brendan McBride
(Clarkson University Potsdam, New York, United States)
Dogus Ozuyar ORCID
(Ankara University)
J. Ribeiro
(Centro de Informação Geoespacial do Exército (CIGeoE))
Benjamin Setterholm
(University of Michigan–Ann Arbor Ann Arbor, Michigan, United States)
Berthold Stober
(VdS Section Spectroscopy)
Mackenna Wood
(Clarkson University Potsdam, New York, United States)
Uwe Zurmuhl
(D-31180 Giesen, Lower Saxony, Germany)
Date Acquired
December 23, 2021
Publication Date
April 30, 2021
Publication Information
Publication: Monthly Notices of the Royal Astronomical Society
Publisher: Royal Astronomical Society / Oxford University Press
Volume: 504
Issue: 4
Issue Publication Date: July 1, 2021
ISSN: 0035-8711
e-ISSN: 1365-2966
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: 80GSFC21M0002
CONTRACT_GRANT: AST-1636624
CONTRACT_GRANT: AST-1715788
CONTRACT_GRANT: EUH 2020 639889
CONTRACT_GRANT: NASA 78249
CONTRACT_GRANT: ERC EUH 2020 DLV-772225-MULTIPLES
PROJECT: FWO-Odysseus program under G0F8H6
CONTRACT_GRANT: AST-1210972
CONTRACT_GRANT: NSF 1506540
CONTRACT_GRANT: NASA NNX16AD43G
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Technical Review
External Peer Committee
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