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Simulating galaxy formation with black hole driven thermal and kinetic feedback

Weinberger, Rainer and Springel, Volker and Hernquist, Lars and Pillepich, Annalisa and Marinacci, Federico and Pakmor, Rüdiger and Nelson, Dylan and Genel, Shy and Vogelsberger, Mark and Naiman, Jill and Torrey, Paul (2017) Simulating galaxy formation with black hole driven thermal and kinetic feedback. Monthly Notices of the Royal Astronomical Society, 465 (3). pp. 3291-3308. ISSN 0035-8711.

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The inefficiency of star formation in massive elliptical galaxies is widely believed to be caused by the interactions of an active galactic nucleus (AGN) with the surrounding gas. Achieving a sufficiently rapid reddening of moderately massive galaxies without expelling too many baryons has however proven difficult for hydrodynamical simulations of galaxy formation, prompting us to explore a new model for the accretion and feedback effects of supermassive black holes. For high-accretion rates relative to the Eddington limit, we assume that a fraction of the accreted rest mass energy heats the surrounding gas thermally, similar to the ‘quasar mode’ in previous work. For low-accretion rates, we invoke a new, pure kinetic feedback model that imparts momentum to the surrounding gas in a stochastic manner. These two modes of feedback are motivated both by theoretical conjectures for the existence of different types of accretion flows as well as recent observational evidence for the importance of kinetic AGN winds in quenching galaxies. We find that a large fraction of the injected kinetic energy in this mode thermalizes via shocks in the surrounding gas, thereby providing a distributed heating channel. In cosmological simulations, the resulting model produces red, non-star-forming massive elliptical galaxies, and achieves realistic gas fractions, black hole growth histories and thermodynamic profiles in large haloes.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Springel, Volker0000-0001-5976-4599
Hernquist, Lars0000-0001-6950-1629
Pillepich, Annalisa0000-0003-1065-9274
Marinacci, Federico0000-0003-3816-7028
Genel, Shy0000-0002-3185-1540
Vogelsberger, Mark0000-0001-8593-7692
Torrey, Paul0000-0002-5653-0786
Additional Information:© 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Received: 12 July 2016. Revision Received: 16 October 2016. Accepted: 11 November 2016. Published: 22 November 2016. The authors thank Peter Behroozi for providing his data and for useful advice, as well as Kevin Schaal for providing his shock finding algorithm. RW, VS and RP acknowledge support through the European Research Council under ERC-StG grant EXAGAL-308037. RW, VS and RP would like to thank the Klaus Tschira Foundation. RW acknowledges support by the IMPRS for Astronomy and Cosmic Physics at the University of Heidelberg. SG and PT acknowledge support provided by NASA through Hubble Fellowship grant HST-HF2-51341.001-A and HF2-51384.001-A, respectively, awarded by the STScI, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. LH acknowledges support from NASA grant NNX12AC67G and NSF grant AST-1312095. Simulations were run on the HazelHen supercomputer at the High-Performance Computing Center Stuttgart (HLRS) as part of project GCS-ILLU of the Gauss Centre for Supercomputing (GCS).
Funding AgencyGrant Number
European Research Council (ERC)EXAGAL-308037
Klaus Tschira FoundationUNSPECIFIED
University of HeidelbergUNSPECIFIED
NASA Hubble FellowshipHST-HF2-51341.001-A
NASA Hubble FellowshipHF2-51384.001-A
Subject Keywords:black hole physics, methods: numerical, galaxies: clusters: general, galaxies: evolution, galaxies: formation, cosmology: theory
Issue or Number:3
Record Number:CaltechAUTHORS:20170418-090218564
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Official Citation:Rainer Weinberger, Volker Springel, Lars Hernquist, Annalisa Pillepich, Federico Marinacci, Rüdiger Pakmor, Dylan Nelson, Shy Genel, Mark Vogelsberger, Jill Naiman, Paul Torrey; Simulating galaxy formation with black hole driven thermal and kinetic feedback. Mon Not R Astron Soc 2017; 465 (3): 3291-3308. doi: 10.1093/mnras/stw2944
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76629
Deposited By: Ruth Sustaita
Deposited On:18 Apr 2017 16:45
Last Modified:09 Mar 2020 13:19

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