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X-ray emission of interacting wind binaries in Cyg OB2

Published online by Cambridge University Press:  25 February 2014

Y. Nazé ,
C. Cazorla  and
G. Rauw
Y. Nazé
Affiliation:
Département A.G.O., Université de Liège, Belgium
C. Cazorla
Affiliation:
Département A.G.O., Université de Liège, Belgium
G. Rauw
Affiliation:
Département A.G.O., Université de Liège, Belgium
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Abstract

Cyg OB2 #5, #8A, and #9 are binary or multiple massive stars in the Cyg OB2 association displaying several peculiarities, such as bright X-ray emission and non-thermal radio emission. Our X-ray monitoring of these stars reveals the details of their behaviours at high energies, which can be directly linked to wind-wind collisions (WWCs). In addition, the X-ray emission of Cyg OB2 #12, an evolved massive star, shows a long-term decrease, which could hint at the presence of a companion (with associated colliding winds) or indicate the return to quiescence of the star following a recent eruption.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 413 - 414
Copyright
© EAS, EDP Sciences, 2014

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References

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