Clusters of galaxies in the mid-infrared
  We describe the results of observations of galaxy clusters conducted with ISOCAM on-board the Infrared Space Observatory. Our research is aimed at understanding the processes driving galaxy evolution in dense environments, free from the bias of dust extinction. The results reveal quite a complex picture: the star-formation activity of cluster galaxies does not show a simple evolution with redshift, but also depends on the dynamical status and evolutionary history of the clusters. 
A. Biviano (1), L. Metcalfe (2), D. Coia (3), B. McBreen (3), B.   Altieri (2), R. Perez-Martinez (2), C. Sanchez-Fernandez ...