The Distribution of Black Holes in Galaxy Halos

Details The Distribution of Black Holes in Galaxy Halos The Distribution of Black Holes in Galaxy Halos

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1201...29b&link_type=abstract

THE MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP Conference Proceedings, Volume 1201, pp. 29-32 (200

Mathematics

Logic

Black Holes, Stellar Mass, Star Formation, Quasars, Interstellar Matter, Galactic Nuclei, Circumnuclear Matter, And Bulges, Mass And Mass Distribution, Star Formation, Quasars, Physical Properties

Scientific paper

Supermassive black holes (SMBHs) have a ubiquitous presence in massive galaxies, and their growth has been shown to be inextricably connected to that of their host galaxy. As galaxies assemble through hierarchical merging, some black holes grow to become the central black holes of massive galaxies; however, others may be ejected into the outer regions of galaxies where they will remain quiescent. We use a cosmological N-body simulation of a Milky Way-like galaxy to examine the formation and merging histories of seed black holes during hierarchical assembly. Our method incorporates star formation, supernova feedback, a physically motivated description of black hole seed creation, gravitational recoil, growth, and merging, and a feedback mechanism based on observations of distant and local quasars. We show that seed black hole formation is truncated at a redshift of z = 7.5 due to the diffusion of metals throughout the ISM. Seed black holes form predominantly in the most massive halos, and an increased rate of black hole mergers results in a greater number of ``wandering'' black holes which have been ejected from the centers of their host galaxies due to gravitational recoil.

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