Feedback and late star formation in elliptical galaxies

Details Feedback and late star formation in elliptical galaxies Feedback and late star formation in elliptical galaxies

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap%26ss.284..857f&link_type=abstract

Astrophysics and Space Science, v. 284, Issue 2, p. 857-860 (2003).

Astronomy and Astrophysics

Astrophysics

Galaxies: Elliptical And Lenticular, Cd, Galaxies: Evolution, Galaxies: Stellar Content

Scientific paper

We present a one-zone model of star formation in elliptical galaxies that includes thermal feedback from supernovae and a temperature dependent star formation efficiency. The modulation of feedback with the total mass results in the triggering of late episodes of star formation in low-mass galaxies. These small `bursts' can occur as late as at redshifts z ˜ 0.5 but they do not change significantly the optical and NIR color-magnitude relation (CMR) of cluster galaxies, both locally and out to moderate redshifts, in agreement with the observations. However, they introduce a large scatter at the faint end of the NUV-Optical CMR, as recently found in cluster Abell 851 (z = 0.41).

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