Gas clumping in the outskirts of Hydra A and A2142

Galaxy cluster outskirts are the regions where structure formation occursthrough the accretion of smaller structures along largescale filaments.Recently, it has been claimed both from observations and numerical simulationsthat an important fraction of the infalling material should be in the form ofdense clumps. If this is the case, we argue that a sufficiently long XMMobservation should allow us to detect these clumps and distinguish them frompoint sources. We propose 8 25 ks observations of the outskirts of Hydra A andA2142, which were selected based on their high azimuthal scatter in ROSATobservations. The proposed program will allow us to set constraints on theexistence of dense clumps down to a flux of 2e15 ergs cm2 s1 (0.52.0 keV band) and a scale of 1080 kpc. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]