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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
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
Pages:
59-65
Host title:
NEW QUESTS IN STELLAR ASTROPHYSICS II
Publication date:
2007-06-26
DOI:
ISSN:
1570-6591
Source identifiers:
22096
ISBN:
9780387876207
Keywords:
Pubs id:
pubs:22096
UUID:
uuid:a9a7eac3-69b3-459f-90b3-dfbe8462e025
Local pid:
pubs:22096
Deposit date:
2012-12-19

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