Speaker
Description
We report on large-scale X-ray properties of the remarkable galaxy group Nest 200047 using 140 ks Chandra and 25 ks XMM-Newton data. The galaxy group Nest 200047 hosts a remarkably complex structure comprising four pairs of distinct radio lobes: the largest number of consecutive AGN outbursts known to date. Its outermost radio structures, extending to over 200 kpc radius, rival the largest cavities discovered in more massive clusters. They exhibit a striking array of filamentary radio structures, likely representing the most advanced stage of bubble evolution observed so far. We find a limb-brightened cavity in the X-ray data corresponding to the third-largest radio bubble, estimating that the central AGN has been driving energy of ~7e57 erg into the intragroup medium (IGrM). We also find indications of temperature and density fluctuation corresponding to the largest radio lobe in the XMM data that suggest the central AGN is heating the IGrM at the largest scale. Based on the thermodynamic properties near the core, we are currently constraining the accretion power of the central AGN and estimating what fraction of this energy ends up heating the IGrM. Nest 200047's proximity and recurrent AGN activity will allow us to infer multi-scale impact and time evolution of kinetic-mode feedback over hundreds of Myr.
