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The Nature of Unseen Companions in Massive Single-Line Spectroscopic Binaries

Published online by Cambridge University Press:  29 August 2024

Hugues Sana Open the ORCID record for Hugues Sana [Opens in a new window] ,
Michael Abdul-Masih Open the ORCID record for Michael Abdul-Masih [Opens in a new window] ,
Gareth Banyard ,
Julia Bodensteiner Open the ORCID record for Julia Bodensteiner [Opens in a new window] ,
Dominic M. Bowman Open the ORCID record for Dominic M. Bowman [Opens in a new window] ,
Karan Dsilva ,
C. Eldridge ,
Matthias Fabry Open the ORCID record for Matthias Fabry [Opens in a new window] ,
Abigail J. Frost  and
Calum Hawcroft Open the ORCID record for Calum Hawcroft [Opens in a new window]
...Show all authors
Hugues Sana*
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Michael Abdul-Masih
Affiliation:
ESO, Alonso de Cordova 3107, Vitacura, Santiago de Chile, Chile
Gareth Banyard
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Julia Bodensteiner
Affiliation:
ESO, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany
Dominic M. Bowman
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Karan Dsilva
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
C. Eldridge
Affiliation:
Amateur Astronomer, 242 Randell Rd, 6125 Mardella, Western Australia
Matthias Fabry
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Abigail J. Frost
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Calum Hawcroft
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Soetkin Janssens
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Laurent Mahy
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium Royal Observatory of Belgium, Avenue Circulaire/Ringlaan 3, B-1180 Brussels, Belgium
Pablo Marchant
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Norbert Langer
Affiliation:
Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn (D) Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Timothy Van Reeth
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Koushik Sen
Affiliation:
Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn (D) Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Tomer Shenar
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium Anton Pannekoek Institute for Astronomy, Science Park 904, 1098 XH, Amsterdam (NL)
*
email: hugues.sana@kuleuven.be
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Abstract

Massive stars are predominantly found in binaries and higher order multiples. While the period and eccentricity distributions of OB stars are now well established across different metallicity regimes, the determination of mass-ratios has been mostly limited to double-lined spectroscopic binaries. As a consequence, the mass-ratio distribution remains subject to significant uncertainties. Open questions include the shape and extent of the companion mass-function towards its low-mass end and the nature of undetected companions in single-lined spectroscopic binaries. In this contribution, we present the results of a large and systematic analysis of a sample of over 80 single-lined O-type spectroscopic binaries (SB1s) in the Milky Way and in the Large Magellanic Cloud (LMC). We report on the developed methodology, the constraints obtained on the nature of SB1 companions, the distribution of O star mass-ratios at LMC metallicity and the occurrence of quiescent OB+black hole binaries.

Keywords

binaries: spectroscopicstars: early-typestars: evolutionblack hole physicssupernovae: generalstars: neutrongravitational waves
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 267 - 272
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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