Star formation activity in galaxy clusters near and far

We present observational constraints on the interaction of cluster galaxies with the intra-cluster medium over a time-span of about half the age of the universe. At high redshift, we make use of the 20 clusters of the ESO Distant Cluster Survey (EDisCS), which span the redshift range of 0.4 < z < 1 and a range in velocity dispersions of ∼ 200 - 1100 km/s. At low redshift, we rely on a large sample of clusters drawn from the Sloan Digital Sky Survey (SDSS). These wide ranges in redshift and mass enable us to take the first steps towards disentangling the age and environment dependences of star formation activity (as measured e.g. by the fraction of [OII]-emitting galaxies), thereby pinpointing the physics responsible for suppressing star formation in clusters.