Formation Scenarios of Hot Subdwarf Stars and their Implications for the Far-UV Excess of Elliptical Galaxies

Details Formation Scenarios of Hot Subdwarf Stars and their Implications for the Far-UV Excess of Elliptical Galaxies Formation Scenarios of Hot Subdwarf Stars and their Implications for the Far-UV Excess of Elliptical Galaxies

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aspc..452....3h&link_type=abstract

Fifth Meeting on Hot Subdwarf Stars and Related Objects, ASP Conference Series Vol. 452, proceedings of a workshop held at Stell

Astronomy and Astrophysics

Astronomy

Scientific paper

In this talk, we review the latest various formation scenarios of hot subdwarf stars,
and propose two new formation channels, an envelope ejection channel for metal-rich
stellar population and a tidally enhanced stellar wind channel for a small
fraction of binary systems. We then discuss the implications of the formation scenarios
for far-UV excess of elliptical galaxies, and predict that
the far-UV excess does not depend much on metallicity if the metallicity
is lower than solar, but increases with mellallicity if the metallicity is over solar.

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