Jet-Intracluster Medium Interactions of the Head Tail Radio Galaxy 3C 129

We propose XMMNewton obervations of the galaxy cluster 3C 129 which harbors theradiogalaxy 3C 129 (z0.022). The radio galaxy.s tail extends over 15 arcmin(virgul500 kpc). Chandra observations of 3C 129 show a highly interesting nonuniformIntracluster Medium (ICM) temperature and entropy and indicate that theradiotail is pinched at a location where the entropy decreases dramatically.The high photon statistics XMM observation will allow us to study in detail thetransition region between the high and low temperature ICM. Furthermore, it willbe possible to test if the entropy variations can be associated with residualsof large scale structure formation schocks. Finally, the radiotail/ICM pressurebalance can be studied along the full extension of the tail. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]