Abstract Details
| Name: Asif Iqbal Ahangar Affiliation: University of Kashmir Conference ID: ASI2016_556 Title : Entropy excess and energy deposition profile in galaxy clusters up to virial radius Authors and Co-Authors : Asif Iqbal^1, Subhabrata Majumdar^2, Biman B. Nath^3 and Manzoor A. Malik^1 ^1 Department of Physics, University of Kashmir, Hazratbal, Srinagar, J&K, 190001, India ^2 Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai, 400005, India ^3 Raman Research Institute, Sadashiva Nagar, Banglore, 560080, India Abstract Type : Oral Abstract Category : General Relativity and Cosmology Abstract : Recent studies have revealed that non-gravitational processes play important role in modifying the thermodynamic properties of the intracluster medium (ICM). It has also been observed that there is entropy enhancement in galaxy clusters which is believed to be a result of the non-gravitational feedback from active galactic nuclei, radiative cooling, supernovae etc. Here, we study the entropy and energy deposition profiles in galaxy clusters due to the non-gravitational processes by comparing the observed entropy profiles to the baseline simulated entropy profiles without feedback from both adaptive mesh refinement (AMR) and smoothed particle hydrodynamic (SPH) up to the virial radius. We find that energy per particle to be around 0.6-1.6 kev up to r500 in galaxy clusters. Moreover, in the outer regions which directly probe the feedback energy duo pre-heating era, we show that any significant preheating is ruled out. |