EDP Sciences
Free access
Issue
A&A
Volume 369, Number 3, April III 2001
Page(s) 750 - 757
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20000555


A&A 369, 750-757 (2001)
DOI: 10.1051/0004-6361:20000555

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

K. Rakos1, D. Dominis2 and S. Steindling3

1  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

(Received 23 August 1999 / Accepted 19 December 2000 )

Abstract
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.


Key words: galaxies: clusters: individual: A2218 -- galaxies: evolution -- galaxies: fundamental parameters -- galaxies: photometry

Offprint request: K. Rakos, karl.rakos@chello.at

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