GALEX UV-derived Star Formation History of Elliptical Galaxies

Details GALEX UV-derived Star Formation History of Elliptical Galaxies GALEX UV-derived Star Formation History of Elliptical Galaxies

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..374..463y&link_type=abstract

From Stars to Galaxies: Building the Pieces to Build Up the Universe. ASP Conference Series, Vol. 374, proceedings of the confer

Physics

Scientific paper

The recent GALEX ultraviolet data have revealed that giant elliptical galaxies are still forming stars. Up to half of the nearby bright ellipticals have been found to show an unexpectedly-strong UV flux, which is most naturally explained by a minor level of residual star formation. This is consistent with the prediction from hierarchical merger models with a strong feedback. The residual star formation is more often found among the galaxies with a lower velocity dispersion and with a lower local density. Much of the content of this article has already been published previously by our group during 2005--2006 as cited in the text.

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