Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4420b&link_type=abstract
American Astronomical Society, AAS Meeting #211, #44.20; Bulletin of the American Astronomical Society, Vol. 39, p.795
Other
Scientific paper
We study the effect of quasar feedback on distributions of baryons in galaxy groups using high resolution numerical simulations. We use entropy conserving Gadget code that include cooling, star formation and other feedback mechanism other than quasar feedback. We use a sample of 10 galaxy group sized halos with mass in the range of (1-5).1013 solar masses. We find star formation is suppressed by more than 30 % in the inner region due to the additional pressure support by quasar feedback. Gas is driven from the inner region towards the outer region of the halos due to the additional pressure support by quasar feedback. As a result, on an average gas density is found to be 10-15 % lower in the inner region and 10 % higher in the outer region in the simulation including quasar feedback. We also find an enhancement of pressure 10-15 % in the outer region due to quasar feedback. Temperature and entropy shows 10-15 % enhancement in the inner region of the halos in simulation including quasar feedback. We also calculate thermal SZ flux decrement for the halos. We find quasar feedback leads to 5-6 % enhancement of SZ flux. This contributes to 10-12 % change in SZ angular spectrum Cl for l> 5000. Finally we establish a relation between SZ flux decrement and the total black hole luminosity in individual halos which can be used to study the amount of quasar feedback to the surrounding intracluster medium.
Bhattacharya Suman
Di Matteo Tiziana
Kosowsky Arthur
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