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The surprising X-ray emission of Oe stars

Published online by Cambridge University Press:  12 July 2011


Yael Nazé
Affiliation:
FNRS-ULg, Dept AGO, Allée du 6 Août 17, Bât B5C, B4000-Liège, Belgium, email: naze@astro.ulg.ac.be
Gregor Rauw
Affiliation:
FNRS-ULg, Dept AGO, Allée du 6 Août 17, Bât B5C, B4000-Liège, Belgium, email: naze@astro.ulg.ac.be
Asif ud-Doula
Affiliation:
Penn State Worthington Scranton, 120 Ridge View Drive, Dunmore, PA 18512, USA
Corresponding
E-mail address:

Abstract

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.


Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2011

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