The relative abundances of ellipticals and starbursts among the Extremely Red Galaxies

Details The relative abundances of ellipticals and starbursts among the Extremely Red Galaxies The relative abundances of ellipticals and starbursts among the Extremely Red Galaxies

2001-10-30

arxiv.org/abs/astro-ph/0110648v1

Mon.Not.Roy.Astron.Soc. 329 (2002) L57

Astronomy and Astrophysics

Astrophysics

5 pages, MNRAS, in press

Scientific paper

10.1046/j.1365-8711.2002.05108.x

We present J band observations of a complete sample of 57 red galaxies selected to have K<20 and R-K>5.3. We use the Pozzetti and Mannucci (2000) prescriptions, based on the R-K and J-K colours, to separate the two dominant populations, old ellipticals and dusty starbursts. We find that both populations are present in the current sample and have similar abundances, and discuss the uncertainties in this result. Galactic stars comprise about 9% of the objects. The starburst galaxies of the present sample are found to give a contribution to the cosmic star formation density similar to the Lyman-break galaxies.

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