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Title: Black holes, galaxy formation, and the M[subscript BH]-σ relation
Authors: King, Andrew
First Published: 10-Oct-2003
Publisher: IOP Publishing
Citation: Astrophysical Journal Letters, 2003, 596 (1),L27-L29
Abstract: Recent X-ray observations of intense high-speed outflows in quasars suggest that supercritical accretion on to the central black hole may have an important effect on a host galaxy. I revisit some ideas of Silk & Rees and assume that such flows occur in the final stages of building up the black hole mass. It is now possible to model explicitly the interaction between the outflow and the host galaxy. This is found to resemble a momentum-driven stellar wind bubble, implying a relation M[subscript BH] = (f[subscript g]κ/2πG[superscript 2])σ[superscript 4] ≃ 1.5 × 10[superscript 8]σ[superscript 4, subscript 200] M[subscript ☉] between black hole mass and bulge velocity dispersion (f[subscript g] = gas fraction of total matter density, κ = electron scattering opacity), without free parameters. This is remarkably close to the observed relation in both slope and normalization. This result suggests that the central black holes in galaxies gain most of their mass in phases of super-Eddington accretion, which are presumably obscured or at high redshift. Observed super-Eddington quasars are apparently late in growing their black hole masses.
DOI Link: 10.1086/379143
ISSN: 2041-8205
eISSN: 2041-8213
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2003, The American Astronomical Society. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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