Volume 369, Number 3, April III 2001
|Page(s)||750 - 757|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 April 2001|
Intermediate-band photometry of a rich cluster of galaxies: A2218
Institute for Astronomy, University of Vienna, Austria
2 Faculty of Geodesy, University of Zagreb, Croatia
3 Wise Observatory, School of Physics and Astronomy, Tel Aviv University, Israel
Corresponding author: K. Rakos, email@example.com
Accepted: 19 December 2000
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 (), 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.
Key words: galaxies: clusters: individual: A2218 / galaxies: evolution / galaxies: fundamental parameters / galaxies: photometry
© ESO, 2001
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