The Star Formation History of Early-type Galaxies

Details The Star Formation History of Early-type Galaxies The Star Formation History of Early-type Galaxies

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007rmxac..28..109y&link_type=abstract

The 3rd Mexico-Korea Conference on Astrophysics: Telescopes of the Future and San Pedro Mártir (Eds. Stan Kurtz, José Franco, Se

Astronomy and Astrophysics

Astrophysics

3

Galaxies: Elliptical And Lenticular, Cd, Galaxies: Evolution, Galaxies: Formation, Galaxies: Fundamental Parameters

Scientific paper

The UV light is an effective tracer for young stars. Base on the recent GALEX UV data of nearby, bright early-type galaxies, we find that 30% of them show a UV flux that is too strong to explain without invoking a 1-3% (in total stellar mass) star formation rate in the last billion years. This implies that low-level residual star formation was common during the last few billion years even in bright, early-type galaxies. We discuss the implications for the formation and evolution of early-type galaxies. This article is a summary of our recent work (Yi et al. 2005; Schawinski et al. 2006; Kaviraj et al. 2006).

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