Constraining the star-formation activity in 10 SpARCS clusters: star-formation in the densest regions at z =1

We propose deep PACS imaging at 110/160 microns of a unique sample of ten highredshift galaxy clusters spanning 0.87<z<1.34. These rich clusters are drawn from the homogeneously selected Spitzer Adaptation of the Redsequence Cluster Survey (SpARCS), and have impressive spectroscopic coverage (a total of 457 confirmed members) and extensive multiwavelength followup data (UVMIR). These clusters bridge a pivotal epoch when star formation shifts toward higher densities and when substantial cluster mass is assembled. Moreover, MIPS imaging has already identified 55 cluster members, confirming that dust enshrouded star formation is occurring in these dense fields. We will use the PACS/MIPS data, in combination with the extensive optical spectroscopy and photometry, to characterize the nature of IRluminous galaxies in clusters at zvirgul1. We will also measure the total star formation rate in these clusters, which will be used to study the effect of environment on galaxy formation. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]