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A combined HST and XMM-Newton campaign for the magnetic O9.7 V star HD 54879: towards constraining the weak-wind problem of massive stars
T. Shenar, L. M. Oskinova, S. P. Järvinen +7
Context: HD 54879 (O9.7 V) is one of a dozen O-stars for which an organized atmospheric magnetic field has been detected. To gain insights into the interplay between atmospheres, w…
Coupling hydrodynamics with comoving frame radiative transfer: II. Stellar wind stratification in the high-mass X-ray binary Vela X-1
Andreas A. C. Sander, Felix Fürst, Peter Kretschmar +5
CONTEXT: Vela X-1, a prototypical high mass X-ray binary (HMXB), hosts a neutron star (NS) in a close orbit around an early-B supergiant donor star. Accretion of the donor star's w…
Observational properties of massive black hole binary progenitors
R. Hainich, L. M. Oskinova, T. Shenar +6
The first directly detected gravitational waves (GW 150914) were emitted by two coalescing black holes (BHs) with masses of ~36Msun and ~29Msun. Several scenarios have been propose…
Coupling hydrodynamics with comoving frame radiative transfer: I. A unified approach for OB and WR stars
Andreas A. C. Sander, Wolf-Rainer Hamann, Helge Todt +2
CONTEXT: For more than two decades, stellar atmosphere codes have been used to derive the stellar and wind parameters of massive stars. Although they have become a powerful tool an…
The metallicity dependence of WR winds
R. Hainich, T. Shenar, A. Sander +2
Wolf-Rayet (WR) stars are the most advanced stage in the evolution of the most massive stars. The strong feedback provided by these objects and their subsequent supernova (SN) expl…
Stellar Winds in Massive X-ray Binaries
Peter Kretschmar, Silvia Martínez-Núñez, Enrico Bozzo +15
Strong winds from massive stars are a topic of interest to a wide range of astrophysical fields. In High-Mass X-ray Binaries the presence of an accreting compact object on the one…