X-rays from Hot Subdwarfs

Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, 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 r...

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Bibliographic Details
Published in:arXiv.org 2015-10
Main Authors: Mereghetti, Sandro, Nicola La Palombara
Format: Article
Language:English
Subjects:
Binary stars
Companion stars
Deposition
Emission
Low mass stars
Neutron stars
Neutrons
Satellite-borne instruments
Stellar winds
Subdwarf stars
White dwarf stars
X-rays
XMM (spacecraft)
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Summary:Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, 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:2331-8422
DOI:10.48550/arxiv.1510.04173