EAS Publications Series
Volume 24, 2007CRAL-2006. Chemodynamics: From First Stars to Local Galaxies
|Page(s)||73 - 76|
|Published online||21 April 2007|
E. Emsellem, H. Wozniak, G. Massacrier, J.-F. Gonzalez, J. Devriendt and N. Champavert (eds)
EAS Publications Series, 24 (2007) 73-76
GALEX-derived Residual Star Formation History of Elliptical Galaxies
Yonsei University, Department of Astronomy, Seoul, South Korea
2 University of Oxford, Astrophysics, Oxford, UK
Bright early-type galaxies are still forming stars at low-level residual star formation (RSF) mode. The GALEX UV satellite has detected excessive UV flux in >30% of our volume-limited sample of ~ 103 galaxies. The RSF galaxy fraction is higher among the dynamically low-mass sample (RSF-σ relation). We postulate that this is a result of a “critical” MBH − σ relation that regulates residual star formation activities in early type galaxies. Implications are discussed.
© EAS, EDP Sciences, 2007
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