Gravitational torque-driven black hole growth and feedback in cosmological simulations
Hopkins, Philip F.
AffiliationUniv Arizona, Dept Astron
quasars: supermassive black holes
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationGravitational torque-driven black hole growth and feedback in cosmological simulations 2017, 464 (3):2840 Monthly Notices of the Royal Astronomical Society
Rights© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
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AbstractWe investigate black hole-host galaxy scaling relations in cosmological simulations with a self-consistent black hole growth and feedback model. Our sub-grid accretion model captures the key scalings governing angular momentum transport by gravitational torques from galactic scales down to parsec scales, while our kinetic feedback implementation enables the injection of outflows with properties chosen to match observed nuclear outflows (star formation-driven winds are not included to isolate the effects of black hole feedback). We show that 'quasar mode' feedback can have a large impact on the thermal properties of the intergalactic medium and the growth of galaxies and massive black holes for kinetic feedback efficiencies as low as 0.1 per cent relative to the bolometric luminosity. None the less, our simulations indicate that the black hole-host scaling relations are only weakly dependent on the effects of black hole feedback on galactic scales, since black hole feedback suppresses the growth of galaxies and massive black holes by a similar amount. In contrast, the rate at which gravitational torques feed the central black hole relative to the host galaxy star formation rate governs the slope and normalization of the black hole-host correlations. Our results suggest that a common gas supply regulated by gravitational torques is the primary driver of the observed co-evolution of black holes and galaxies.
VersionFinal published version
SponsorsCIERA Postdoctoral Fellowship; South African Research Chairs Initiative; South African National Research Foundation; NASA ATP grant [NNX12AH86G, NNX14AH35G]; NSF [AST-1412836, AST-1517491, AST-1108753, 1411920, 1455342, ACI-1053575, PHY-1066293]; NASA [NNX15AB22G]; STScI [HST-AR-14293.001-A, HST-GO-14268.022-A]; NASA TCAN award [NNX14AB48G]; Alfred P. Sloan Research Fellowship