Intermediate-band photometry of a rich cluster of galaxies: A2218

Details Intermediate-band photometry of a rich cluster of galaxies: A2218 Intermediate-band photometry of a rich cluster of galaxies: A2218

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...369..750r&link_type=abstract

Astronomy and Astrophysics, v.369, p.750-757 (2001)

Astronomy and Astrophysics

Astrophysics

6

Galaxies: Clusters: Individual: A2218, Galaxies: Evolution, Galaxies: Fundamental Parameters, Galaxies: Photometry

Scientific paper

This paper presents four color intermediate-band photometry of the cluster A2218 carried out using the Wise Observatory 1 m telescope. A2218 is one of the richest clusters in the Abell catalogue, with richness class 4. We find that A2218 has an unusually low fraction of blue galaxies for its redshift (z=0.171), and is populated mainly by E/S0 galaxies, while starburst systems are very scarce. The few starbursting galaxies present populate the faint end of the cluster luminosity function, close to the limiting magnitude of our observations. The difference between A2218 and other clusters at similar redshifts is very remarkable, underlining the influence of cluster richness on the evolution of its member galaxies.

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