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Feedback by supermassive black holes in galaxy evolution: Impacts of accretion and outflows on the star formation rate


Raouf, M and Silk, J and Shabala, SS and Mamon, GA and Croton, DJ and Khosroshahi, HG and Beckmann, RS, Feedback by supermassive black holes in galaxy evolution: Impacts of accretion and outflows on the star formation rate, Monthly Notices of the Royal Astronomical Society, 486, (2) pp. 1509-1522. ISSN 0035-8711 (2019) [Refereed Article]


Copyright Statement

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society : 2019 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

DOI: doi:10.1093/mnras/stz907


We describe a physical model of the outflows produced as a result of gas accretion on to a black hole, and the resultant changes to star formation rates and efficiencies in galaxies, using the RADIO-SAGE semi-analytic galaxy formation model. We show that the ratio of outflow rate to SFR of galaxies is mainly driven by black hole mass and virial halo mass, and show that the SFR is higher than the outflow rate at low black hole masses. The model consistently reproduces the observed evolution of star formation rate density from 𝓏 = 6 to 𝓏 = 0, as well as the trend of the stellar mass - halo mass relations. We show the characteristic growth of massive galaxies influenced by AGN feedback at different redshifts. We find feedback to be prevalent in the most massive galaxy haloes, inhibiting the cooling catastrophe.

Item Details

Item Type:Refereed Article
Keywords:galaxies: active galaxies: evolution galaxies: formation galaxies: general galaxies: haloes galaxies: star formation
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Cosmology and extragalactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Shabala, SS (Associate Professor Stas Shabala)
ID Code:136806
Year Published:2019
Web of Science® Times Cited:6
Deposited By:Physics
Deposited On:2020-01-20
Last Modified:2020-05-25
Downloads:3 View Download Statistics

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