271 citations · 4.4k across the 144 of their papers we have counts for
10 papers · 1 filter
BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant Puppis unveils the photospheric drivers of its small- and large-scale wind structures
Tahina Ramiaramanantsoa, Anthony F. J. Moffat, Robert Harmon +33
From months of dual-band optical photometric monitoring at the mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star …
Stellar population of the superbubble N206 in the LMC I. Analysis of the Of-type stars
Varsha Ramachandran, R. Hainich, W. -R. Hamann +5
Massive stars are the key agents of feedback. Consequently, quantitative analysis of massive stars are required to understand how the feedback of these objects shapes/ creates the…
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…
On the binary nature of massive blue hypergiants: high-resolution X-ray spectroscopy suggests that Cyg OB2 12 is a colliding wind binary
L. M. Oskinova, D. P. Huenemoerder, W. -R. Hamann +4
The blue hypergiant Cyg OB2-12 (B3Ia+) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ra…
The variability of the BRITE-est Wolf-Rayet binary, Velorum I. Photometric and spectroscopic evidence for colliding winds
Noel D. Richardson, Christopher M. P. Russell, Lucas St-Jean +26
We report on the first multi-color precision light curve of the bright Wolf-Rayet binary Velorum, obtained over six months with the nanosatellites in the BRITE- Constellation…
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…
Massive stars in advanced evolutionary stages, and the progenitor of GW150914
Wolf-Rainer Hamann, Lidia Oskinova, Helge Todt +4
The recent discovery of a gravitational wave from the merging of two black holes of about 30 solar masses each challenges our incomplete understanding of massive stars and their ev…