X-Ray Luminosity--Mass Relation and AGN Feedback in Galaxy Groups

Most of the mass, most of the baryons, and most of the galaxies in the Universeare in galaxy groups. The processes connecting cooling gas in the hot intergalactic medium and feedback from AGN are more easily observed in groups than inclusters because of their shallower potential wells. A precise characterizationof the Xray luminositymass relation over a large mass range is today.s singlemost important task to ensure that the full cosmological power from the 100000groups and clusters to be detected with eROSITA can be exploited. We will use acomplete sample of almost 90 galaxy groups and clusters to constrain cooling andfeedback mechanisms as well as the LxM relation. Observations for all clustersare available. With this short proposal we aim to complete observations for the group sample. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]