OBSERVING THE SHOCK WAVE IN COMPACT GALAXY CLUSTERS A2065 AND A4038

Numerical simulations predict the formation and development of a shock wave inthe intracluster medium at some stage of a merging cluster event. Despiteextensive efforts however, this strong feature still lack to be observed. Thisis a conspiration between the particular physics involved in exactly this stageof the merging process and the sensitivity of Xray instrument. After applyingcareful selection criteria based on the Xray morphology, temperature and galaxydistribution, we propose to observe the two best candidates aimed to measure forthe first time the physical conditions at the shock wave with XMMNewton. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]