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Binary Stars as the Source of the Far-UV Excess in Elliptical Galaxies

Abstract:

The discovery of an excess of light in the far-ultraviolet (UV) spectrum in elliptical galaxies was a major surprise in 1969. While it is now clear that this UV excess is caused by an old population of hot helium-burning stars without large hydrogen-rich envelopes rather than young stars, their origin has remained a mystery. Here we show that these stars most likely lost their envelopes because of binary interactions, similar to the hot subdwarf population in our own Galaxy. This has major im...

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Publication status:
Published

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Publisher copy:
10.1007/978-0-387-87621-4_8

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Astrophysics
Lynas-Gray, AE More by this author
Pages:
59-65
Publication date:
2007-06-26
DOI:
ISSN:
1570-6591
URN:
uuid:a9a7eac3-69b3-459f-90b3-dfbe8462e025
Source identifiers:
22096
Local pid:
pubs:22096
ISBN:
978-0-387-87620-7
Keywords:

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