Abstract Details
| Name: Deovrat Affiliation: Prasad Conference ID: ASI2016_862 Title : Role of cooling and AGN jets in the evolution of cool-core galaxy clusters. Authors and Co-Authors : 1.Prateek Sharma, Indian Institute of Science, Bangalore, India 2. Arif Babul, University of Victoria, Victoria, Canada Abstract Type : Oral Abstract Category : Extragalactic astronomy Abstract : The existence of cool cores with short cooling times in galaxy clusters is a long-standing puzzle. According to the classical cooling flow model, cluster cores with short cooling times are expected to cool catastrophically and to fuel star formation at a rate of 100–1000 M_sun/yr. However, cooling, dropout, and star formation at these high rates are never seen in cluster cores. AGN jets have been suggested as a possible solution for this puzzle as they have sufficient energy to replenish the cooling losses. We perform 3D and 2D (axi-symmetric) hydrodynamic simulations in spherical geometry, to study the evolution of cool cluster cores heated by feedback-driven bipolar active galactic nuclei (AGNs) jets. Since, Bondi Accretion is in-efficient, cold gas feedback emerges as the primary mechanism for feeding the central Super Massive Black Hole (SMBH). Condensation of cold gas, and the consequent enhanced accretion, is required for AGN feedback to balance radiative cooling with reasonable efficiencies, and to match the observed cool core properties. However, cold gas has angular momentum and settles down in torus around SMBH. We study the distribution of angular momentum of the cold gas and its implication on the cold feedback model. |