Journal article
The environment of bright QSOs at z̃6: Star-forming galaxies and X-ray emission
T Costa, D Sijacki, M Trenti, MG Haehnelt
Monthly Notices of the Royal Astronomical Society | Published : 2014
DOI: 10.1093/mnras/stu101
Abstract
We employ cosmological hydrodynamical simulations to investigate models in which the supermassive black holes powering luminous z̃6 quasars (QSOs) grow from massive seeds. We simulate 18 regions with densities ranging from the mean cosmic density to the highest s peaks in the Millennium simulation volume. Only in the most massive haloes situated in the most overdense regions, can black holes grow to masses up to 109M⊙ by z̃6 without invoking super-Eddington accretion. Accretion on to the most massive black holes becomes limited by thermal active galactic nucleus (AGN) feedback by z̃9-8 with further growth proceeding in short Eddington-limited bursts. Ourmodelling suggests that current fluxli..
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Awarded by Science and Technology Facilities Council
Funding Acknowledgements
We thank George Becker for useful discussions and suggestions and Roberto Maiolino, Roderik Overzier and the anonymous referee for comments on the manuscript. We are also grateful to Simon White for granting access to Millennium Simulation data and Stefan Hilbert for assistance. All simulations presented in this paper were run using the DIRAC Complexity cluster based at the University of Leicester and the COSMOS Supercomputer based at the University of Cambridge funded by STFC. TC acknowledges an STFC studentship. MH acknowledges support by the FP7 ERC Grant Emergence-320596.