Description |
We propose to observe with PACS and SPIRE the unique system of Abell 85: a rich cluster with a feeding filament detected in the X-ray. Through extensive optical spectroscopy, we already detected an overdensity of star-forming galaxies along the filament. Infrared observations, in conjuction with newly obtained GALEX data, will allow us to obtain a complete census of the obscured and unobscured star forming activity along the filament and inside the cluster. Since galaxies are infalling onto the cluster along the filament, this corresponds to studying the different stages of evolution of galaxies during the infall. Moreover, due to the vicinity of the cluster (z=0.055), we will obtain images deep enough to detect dwarf galaxies, those most affected by the environment for which we expect the largest variations in specific star formation. |