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The surprising X-ray emission of Oe stars
Nazé, Yaël; Rauw, Grégor; ud-Doula, Asif
2011In Neiner, Coralie; Wade, G.; Meynet, G. et al. (Eds.) Active OB stars: structure, evolution, mass loss and critical limits
 

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Keywords :
X-rays: stars; stars: early-type; stars: individual (HD 155806); stars: emission-line; Be
Abstract :
[en] Oe stars are thought to represent an extension of the Be phenomenon to higher temperatures. Dedicated XMM observations of HD 155806 revealed a surprising X-ray spectrum: soft character, absence of overluminosity, broad X-ray lines. These properties are fully compatible with the wind-shock model, which usually explains the X-rays from ``normal', single O-type stars. In contrast, some other Oe/Be stars display a completely different behaviour at high energies.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Nazé, Yaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique observationnelle (sol et espace)
Rauw, Grégor  ;  Université de Liège - ULiège > Dept AGO
ud-Doula, Asif;  Penn State Worthington Scranton, 120 Ridge View Drive, Dunmore, PA 18512, USA
Language :
English
Title :
The surprising X-ray emission of Oe stars
Publication date :
01 July 2011
Event name :
IAU Symposium no. 272
Event date :
19-23 July 2010
Audience :
International
Main work title :
Active OB stars: structure, evolution, mass loss and critical limits
Main work alternative title :
[en] Proceedings IAU Symposium no. 272
Editor :
Neiner, Coralie
Wade, G.
Meynet, G.
Peters, G.
Pages :
624-625
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