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Stellar Population in Extremely Red Galaxies

Published online by Cambridge University Press:  01 December 2006

A. Hempel ,
D. Schaerer ,
J. Richard ,
E. Egami  and
R. Pelló
A. Hempel
Affiliation:
Geneva Observatory, Ch. des Maillettes 51, CH-1290 Sauverny, Switzerland email: Angela.Hempel@obs.unige.ch
D. Schaerer
Affiliation:
Geneva Observatory, Ch. des Maillettes 51, CH-1290 Sauverny, Switzerland email: Angela.Hempel@obs.unige.ch Observatoire Midi-Pyréneés, 14 Avenue E. Belin, F-31400Toulouse, France
J. Richard
Affiliation:
Caltech Astronomy, MC105-24, Pasadena, CA 91125, USA
E. Egami
Affiliation:
Steward Observatory, University Arizona, AZ 85721, USA
R. Pelló
Affiliation:
Observatoire Midi-Pyréneés, 14 Avenue E. Belin, F-31400Toulouse, France
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Abstract

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We describe our results on multi-colour observations of extremely red galaxies found in two gravitational lensing clusters (Abell 1835 and AC114). Applying a colour criteria of R-K≥ 5.6 we have selected 12(10) EROs, of which 10(4) have no R-band detection. 5 of these objects have exceptional red colours (R-K>7.5). We compare their colours with other galaxy populations, like distant red galaxies and infrared detected extremely red galaxies, in order to differentiate between them.

Keywords

galaxiesfundamental parameters

References

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