5 papers
A family of binaries with an extreme mass ratio
Yael Naze, Gregor Rauw, Piotr A. Kolaczek-Szymanski +2
Multiplicity is ubiquitous among massive stars. While the stellar components usually display similar masses, some binaries with extremely low mass ratios were also observed. Some o…
Fluorescent Fe K line emission of gamma Cas stars II. Predictions for magnetic interactions and white-dwarf accretion scenarios
Gregor Rauw
About 12 percent of the early-type Be stars, so-called gamma Cas stars, exhibit an unusually hard and bright thermal X-ray emission that could result from accretion onto a white dw…
Apsidal motion and proximity effects in the massive binary BD+60 497
Gregor Rauw, Piotr A. Kolaczek-Szymanski, Yael Naze +1
The eccentric short-period O-star binary BD+60 497 is an interesting laboratory in which to study tidal interactions in massive binary systems, notably via the detection and charac…
Caught in flagrante delicto: evidence for past mass transfer in massive binaries?
Gregor Rauw
Many massive binary systems undergo mass and angular momentum transfer over the course of their evolution. This kind of interaction is expected to deeply affect the properties of t…
X-raying the wind-wind collisions in HD 168112 and HD 167971
Gregor Rauw, Ronny Blomme, Yaël Nazé +1
The O-type long-period binary HD 168112 and triple HD 167971 star systems have been known for several decades for their non-thermal synchrotron radio emission. This emission arises…