Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21332206c&link_type=abstract
American Astronomical Society, AAS Meeting #213, #322.06; Bulletin of the American Astronomical Society, Vol. 41, p.378
Mathematics
Logic
Scientific paper
Feedback from supermassive black hole has a substantial but partially understood impact on structure formation in the universe. The Sunyaev-Zeldovich signal from the hot gas, present in black hole environments serve as a potential probe of this feedback mechanism. Using a simple one-dimensional Sedov-Taylor model of energy outflow we calculate the angular power spectrum of the Sunyaev-Zeldovich distortion. The amplitude of temperature fluctuation is of the order of a micro-Kelvin in the cosmic microwave background at arcminute scales. This signal is at or below the noise level of current microwave experiments including the Atacama Cosmology Telescope and the South Pole Telescope. To further investigate this effect we have constructed microwave maps of the resulting distortion, around individual black holes from a cosmological hydrodynamic simulation. The simulation employs a self-consistent treatment of star formation, supernova feedback and accretion and feedback from supermassive black holes. We show that the temperature distortion scales approximately with the black hole mass and accretion rate, with a typical amplitude up to a few micro-Kelvin on angular scales around 10 arcseconds. We also discuss the possible detection techniques of this signal which includes pointed observations from high resolution millimeter wave telescopes and cross correlation of optical quasar catalogs with microwave maps. These measurements will be challenging but will allow us to characterize the evolution and growth of supermassive black holes and the role of energy feedback from them on galaxy formation.
This work was supported at the University of Pittsburgh by the National Science Foundation through grant AST-0408698 to the ACT project, and by grant AST-0546035. At CMU, this work has been supported in part through NSF AST 06-07819 and NSF OCI 0749212. SC was also partly funded by the Zaccheus Daniel Fellowship at the University of Pittsburgh.
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