X-rays from hot subdwarfs

Thanks to the high sensitivity of the instruments on board the XMM-Newtonand Chandrasatellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs. The small but growing sample of hot subdwarfs detected in X-rays includes binary systems, in which the X-rays res...

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Bibliographic Details
Published in:Advances in space research 2016-09, Vol.58 (5), p.809-820
Main Authors: Mereghetti, Sandro, La Palombara, Nicola
Format: Article
Language:English
Subjects:
Binaries
Binary systems
Companion stars
Hot subdwarfs
Mass-loss
Neutron stars
Stars
Stellar winds
Subdwarf stars
White dwarfs
X-rays
XMM (spacecraft)
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Summary:Thanks to the high sensitivity of the instruments on board the XMM-Newtonand Chandrasatellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs. The small but growing sample of hot subdwarfs detected in X-rays includes binary systems, in which the X-rays result from wind accretion onto a compact companion (white dwarf or neutron star), as well as isolated sdO stars in which X-rays are probably due to shock instabilities in the wind. X-ray observations of these low mass stars provide information which can be useful also for our understanding of the winds of more luminous and massive early-type stars and can lead to the discovery of particularly interesting binary systems.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2015.11.022