... analysis of spectra of low-mass galaxy groups X- ray data of galaxy clusters gives an excellent insight into the density and temperature distribution of the cluster In the next two subsections ... telescope, and a brief overview of eROSITA Chapter discusses ICM cooling, AGN feedback and BCG properties of galaxy groups and results thereof Chapter presents the impact of ICM cooling, AGN feedback and ... namely, X- ray, radio, and nearinfrared (NIR) For the X- ray analysis, the Chandra data was used to extract temperature and density profiles and constrain the central cooling time (CCT) and central...