Journal article

Constraints on the process that regulates the growth of supermassive black holes based on the intrinsic scatter in the M-bh-sigma (sph) relation

J Stuart, B Wyithe, A Loeb

ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2005

Abstract

We show that the observed scatter in the relations between the mass of supermassive black holes (SMBHs), Mbh, and the velocity dispersion σsph or mass Msph of their host spheroid places interesting constraints on the process that regulates SMBH growth in galaxies. When combined with the observed properties of early-type SDSS galaxies, the observed intrinsic scatters imply that SMBH growth is regulated by the spheroid velocity dispersion rather than its mass. The Mbh-Msph relation is therefore a by-product of a more fundamental Mbh- σsph relation. We construct a theoretical model for the scatter among baryon-modified dark matter halo profiles, out of which we generate a population of spheroid..

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University of Melbourne Researchers