Hot subdwarfs in the Galactic Bulge

Details Hot subdwarfs in the Galactic Bulge Hot subdwarfs in the Galactic Bulge

2005-09-22

arxiv.org/abs/astro-ph/0509672v1

Astrophys.J.633:L29-L32,2005

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures, Astrophysical Journal Letter, accepted

Scientific paper

10.1086/498212

Recent observations and theories suggest that extreme horizontal branch (EHB) stars and their progeny should be the cause of the UV excess seen in the spectra of many elliptical galaxies. Since the Galactic Bulge is the closest representation of an old, metal-rich spheroid in which we are able to study the EHB scenario in detail, we obtained spectra of bulge EHB star candidates and we confirm their status as hot evolved stars. It is the first time that such stars are unambiguously identified in the Galactic Bulge.

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