Intermediate-band photometry of a rich cluster of galaxies: A2218
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
Corresponding author: K. Rakos, karl.rakos@chello.at
Received:
23
August
1999
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