Galaxy evolution in the large scale structure around two PISCES galaxy clusters

The effect of environment is an essential, but poorly understood ingredient ingalaxy formation. We propose to measure the gas and dark matter in the clumpsand filaments around two massive distant galaxy clusters. By combining highquality XMM data with our existing widefield opticalNIR imaging andspectroscopy we will perform a census of the baryons in the large scalestructure around these clusters and measure the effects of environment on thefundamental physical properties of the member galaxies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]