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BAT99 126: A multiple Wolf-Rayet system in the Large Magellanic Cloud with a massive near-contact binary
Soetkin Janssens, Tomer Shenar, Laurent Mahy +3
BAT99 126 is a multiple system in the Large Magellanic Cloud containing a Wolf-Rayet (WR) star, which has a reported spectroscopic (orbital) period of 25.5 days and a photometric (…
An extensive spectroscopic time series of three Wolf-Rayet stars -- II. A search for wind asymmetries in the dust-forming WC7 binary WR137
N. St-Louis, C. Piaulet, N. D. Richardson +39
We present the results of a four-month, spectroscopic campaign of the Wolf-Rayet dust-making binary, WR137. We detect only small-amplitude, random variability in the CIII5696 emiss…
A spectroscopic multiplicity survey of Galactic Wolf-Rayet stars. I. The northern WC sequence
Karan Dsilva, Tomer Shenar, Hugues Sana +1
It is now well established that the majority of massive stars reside in multiple systems. However, the effect of multiplicity is not sufficiently understood, resulting in a plethor…
Investigating the lack of main-sequence companions to massive Be stars
J. Bodensteiner, T. Shenar, H. Sana
About 20% of all B-type stars are classical Be stars. The Be phenomenon is strongly correlated with rapid rotation, the origin of which remains unclear. It may be rooted in single-…
Is HR 6819 a triple system containing a black hole? -- An alternative explanation
J. Bodensteiner, T. Shenar, L. Mahy +10
HR 6819 was recently proposed to be a triple system consisting of an inner B-type giant + black hole binary with an orbital period of 40d and an outer Be tertiary. This interpretat…
The 'hidden' companion in LB-1 unveiled by spectral disentangling
T. Shenar, J. Bodensteiner, M. Abdul-Masih +9
The intriguing binary LS V +22 25 (LB-1) has drawn much attention following claims of it being a single-lined spectroscopic binary with a 79-day orbit comprising a B-type star and…
Why binary interaction does not necessarily dominate the formation of Wolf-Rayet stars at low metallicity
T. Shenar, A. Gilkis, J. S. Vink +2
Classical Wolf-Rayet (WR) stars are massive, hydrogen depleted, post main-sequence stars that exhibit emission-line dominated spectra. For a given metallicity Z, stars exceeding a…
The stellar and wind parameters of six prototypical HMXBs and their evolutionary status
R. Hainich, L. M. Oskinova, J. M. Torrejón +7
High-mass X-ray binaries (HMXBs) are exceptional astrophysical laboratories that offer a rare glimpse into the physical processes that govern accretion on compact objects, massive-…