Tiny Star Formation in z 0.8 Massive Early-Type Galaxies

Details Tiny Star Formation in z 0.8 Massive Early-Type Galaxies Tiny Star Formation in z 0.8 Massive Early-Type Galaxies

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342306k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #423.06; Bulletin of the American Astronomical Society, Vol. 41, p.244

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Scientific paper

Previous stellar population analysis of massive (> 11 M_&sun; in log stellar-mass), early-type, red galaxies (MERGs), at low-redshift find a small amount, 1% - 10% by light, of young stars. If these young stars have been formed at a rate that has been constant over a Hubble time ( 14 Gyr), then MERGs back in time ( 6 Gyr) should have a star formation rate of 0.1 - 1.0 M&sun;/yr. Two star formation rate estimates are used, one based on nebular emission lines, the other based on mid-IR luminosity. The two separate measurements of the star formation rate in z 0.8 MERGs both show negligible ongoing star formation.

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