The envelope of the red galaxies distribution in a z=0.75 cluster field.

Details The envelope of the red galaxies distribution in a z=0.75 cluster field. The envelope of the red galaxies distribution in a z=0.75 cluster field.

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...311..446g&link_type=abstract

Astronomy and Astrophysics, v.311, p.446-450

Astronomy and Astrophysics

Astrophysics

3

Galaxies: Redshifts, Galaxies: Clusters, Radio Continuum: Galaxies, Galaxies: Evolution, Galaxies: G 1443-198

Scientific paper

We report the observation of a group of 16 red (V-I>2) galaxies, in the magnitude range 22<=V<=25.5, within a projected distance of 30" (~0.2h^-1^Mpc for h=H_0_/75km/s/Mpc) of the ultra-steep spectrum radio source 1443-198 at z=0.753. The colours of the galaxies range from the cut-off at V-I=2.0 to V-I=3.3. Eight galaxies are redder than V-I=2.3 and three are redder than V-I=3.0. Some objects with I=~23 are undetected at the magnitude limit of V=25.5. This confirms previous results on the presence of a very red envelope in some distant clusters and suggests that a fraction of cluster ellipticals are already old at z=~0.75. The radio galaxy has colours and a 4000A break amplitude typical of evolving E/S0 galaxies, and shows signs of interaction with other objects in its immediate vicinity.

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