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The multiplicity of Galactic Wolf-Rayet stars

Published online by Cambridge University Press:  29 August 2024

Karan Dsilva Open the ORCID record for Karan Dsilva [Opens in a new window] ,
Tomer Shenar ,
Hugues Sana Open the ORCID record for Hugues Sana [Opens in a new window]  and
Pablo Marchant
Karan Dsilva*
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Tomer Shenar
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium Anton Pannekoek Institute for Astronomy, University of Amsterdam, Postbus 94249, 1090 GE Amsterdam, The Netherlands
Hugues Sana
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Pablo Marchant
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
*
email: karandsilva413@gmail.com
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Abstract

We present the results of a magnitude-limited spectroscopic survey of Galactic Wolf-Rayet stars with the HERMES spectrograph mounted on the Mercator telescope. Using cross-correlation to measure radial velocities, we measured the observed binary fractions of the Galactic carbon- (WC) and nitrogen-rich (WN) Wolf-Rayet stars to be and . We used Monte-Carlo simulations with a Bayesian framework to derive the intrinsic multiplicity properties and found and . We find that the majority of WN binaries reside in short-period systems, similar to O stars. However, the orbital period distribution of the Galactic WC population peaks at 5000 d, a discrepancy that challenges our current understanding of binary evolution in Wolf-Rayet stars.

Keywords

stars: Wolf-Rayetstars: binariesstars: evolution
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 496 - 498
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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References

Conti, P. 1976, in Proc. 20th Colloq. Int. Astrophys., Univ. Liege, 193Google Scholar
Crowther, P. A. 2007, Annual Review of Astronomy & Astrophysics, vol. 45, Issue 1, pp.177–219, 45, 177CrossRefGoogle Scholar
Dsilva, K., Shenar, T., Sana, H., & Marchant, P. 2020, Astronomy & Astrophysics, Volume 641, id.A26, 16 pp., 641, A26CrossRefGoogle Scholar
Dsilva, K., Shenar, T., Sana, H., & Marchant, P. 2022, Astronomy & Astrophysics, in press (arXiv: 2204.12518)Google Scholar
Paczyński, B. 1967, Acta Astronomica, 17, 355CrossRefGoogle Scholar
Raskin, G., et al. 2011, Astronomy and Astrophysics, Volume 526, id.A69, 12 pp., 526, A69Google Scholar
Shenar, T., Gilkis, A., Vink, J. S., Sana, H., & Sander, A. a. C. 2020, Astronomy & Astrophysics, Volume 634, id.A79, 12 pp., 634, A79Google Scholar