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The Gaia satellite: a tool for Emission Line Stars and Hot Stars
Christophe Martayan, Yves Fremat, Ronny Blomme +19
The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provid…
Radial velocities, dynamics of stars and nebulosities with GAIA and VLT-GIRAFFE
Christophe Martayan, Yves Fremat, Ronny Blomme +8
This document is divided in two parts. The first part deals with the radial velocities (RV) distributions for B-type stars and nebulosities observed with the VLT-GIRAFFE in the Lar…
Non-thermal radio emission from O-type stars III. Is Cyg OB2 No. 9 a wind-colliding binary?
S. Van Loo, R. Blomme, S. M. Dougherty +1
The star Cyg OB2 No. 9 is a well-known non-thermal radio emitter. Recent theoretical work suggests that all such O-stars should be in a binary or a multiple system. However, there…
Modeling Ultraviolet Wind Line Variability in Massive Hot Stars
A. Lobel, R. Blomme
We model the detailed time-evolution of Discrete Absorption Components (DACs) observed in P Cygni profiles of the Si IV lam1400 resonance doublet lines of the fast-rotating supergi…
The investigation of particle acceleration in colliding-wind massive binaries with SIMBOL-X
M. De Becker, G. Rauw, J. M. Pittard +4
An increasing number of early-type (O and Wolf-Rayet) colliding wind binaries (CWBs) is known to accelerate particles up to relativistic energies. In this context, non-thermal emis…
Three Dimensional Radiative Transfer in Winds of Massive Stars: Wind3D
A. Lobel, R. Blomme
We discuss the development of the new radiative transfer code Wind3D. It solves the non-LTE radiative transport problem in moving stellar atmosphere models in three geometric dimen…