Abstract Details
| Name: Rudrani KarChowdhury Affiliation: Presidency University, Kolkata Conference ID: ASI2019_68 Title : Effect of AGN feedback on the simulated galaxy groups and clusters Authors and Co-Authors : Rudrani Kar Chowdhury, Suchetana Chatterjee, Anto. I. Lonappan, Nishikanta Khandai, Tiziana DiMatteo Abstract Type : Oral Abstract Category : Extragalactic Astronomy Abstract : Feedback from active galactic nuclei (AGN) has a very profound effect on structure formation. By studying the X-ray properties of simulated galaxy groups we evaluate the effect of AGN feedback on the gas in the intra-cluster (group) medium. We compute the X-ray flux in the vicinity of an AGN and find a decrement of the average flux when compared with a scenario where AGN is absent. It can be explained in terms of the feedback from the central engine, which is displacing the gas from the centre of the group/cluster resulting in a reduction of the X-ray flux. We show that the average X-ray flux in the central region of a galaxy group/cluster follows a broken power-law type behaviour with AGN luminosity at z=1. We also find that black hole growth gets suppressed at halos of mass higher than 10^13 M_{sun} which indicates the self regulatory growth of the AGN. From our result downsizing of the AGN luminosity with halo mass is clearly observed which supports the results obtained from clustering studies of AGN. For the first time we use a fully cosmological-hydrodynamic simulation to evaluate the global effects of AGN feedback on X-ray observables and propose that non-gravitational effects such as AGN feedback might be the leading cause for suppressing black hole growth as has been previously suggested. We propose future observations of high redshift AGN through which this paradigm can be robustly tested. |