How to model AGN feedback in cosmological simulations? Debora Sijacki IoA & KICC Cambridge IAU GA - DivJ August 7 2015 Cosmological simulations of galaxy and structure formation Hierarchical growth of Large scale distribution dark matter halos of galaxies Large scale environments Springel et al. 2006 of galaxies: inflows and outflows Boylan-Kolchin et al. (2009) Galaxy morphologies Illustris project Shen et al. 2013 Cosmological simulations of galaxy and structure formation One of the main issues: Gas overcooling in massive galaxies CCrroottoonn eett aall.. 22000066 Sijacki et al. 2007 Cosmological simulations of galaxy and structure formation Observational evidence for the feedback from supermassive black holes: high z QSOs z = 6.4 Costa, Sijacki, Trenti, Haehnelt 2012 Maiolino et al. 2012 Cosmological simulations of galaxy and structure formation Observational evidence for the feedback from supermassive black holes: low z Universe M87, Forman et al. Kormendy & Ho 2013 see also McConnell & Ma, 2013 Perseus cluster, Fabian et al. The Illustris project DM DENSITY with overlaid GAS VELOCITY Box size = 106.5Mpc Min cell size = 48pc 3 x 1820^3 dark matter particles gas cells passive tracers -> 18 billion 8192 cores, 19 MCPUh Physics: primordial & metal line cooling + self-shielding stellar evolution stellar feedback gas recycling chemical enrichment black hole growth black hole feedback: quasar, radiative and radio bubbles (see Springel et al. 2005 Sijacki et al. 2007, Vogelsberger et al. 2013) Vogelsberger et al., MNRAS, 2014 Genel et al., MNRAS, 2014 The Illustris project STELLAR VS. HALO MASS Vogelsberger, Genel, Springel, Torrey, Sijacki, et al., MNRAS, 2014 The Illustris project GALAXY MORPHOLOGIES Vogelsberger et al., MNRAS, 2014 see also e.g. EAGLE, HORIZON AGN, MASSIVE BLACK and Genel et al., MNRAS, 2014 MAGNETICUM projects BHs in Illustris SFR DENSITY & BH MASS DENSITY BH ACCRETION RATE DENSITY Ueda et al. 2014 DUTY CYCLE DUE TO THE RADIO MODE Volonteri et al. 2013 Sijacki et al., 2015 BHs in Illustris BH MASS FUNCTION BH MASS FUNCTION split by redshift split by Eddington ratio at z = 0 Shankar et al. 2013 (Mbh-sigma from McConnell & Ma, 2013) Sijacki et al, 2015