F. van de Voort
The environmental dependence of gas accretion onto galaxies: quenching satellites through starvation
van de Voort, F.; Bahé, Y.M.; Bower, R.G.; Correa, C.A.; Crain, R.A.; Schaye, J.; Theuns, T.
Authors
Y.M. Bahé
R.G. Bower
C.A. Correa
R.A. Crain
J. Schaye
Professor Tom Theuns tom.theuns@durham.ac.uk
Professor
Abstract
Galaxies that have fallen into massive haloes may no longer be able to accrete gas from their surroundings: a process referred to as ‘starvation’ or ‘strangulation’ of satellites. We study the environmental dependence of gas accretion on to galaxies using the cosmological, hydrodynamical EAGLE simulation. We quantify the dependence of gas accretion on stellar mass, redshift, and environment, using halo mass and galaxy overdensity as environmental indicators. We find a strong suppression, of many orders of magnitude, of the gas accretion rate in dense environments, primarily for satellite galaxies. This suppression becomes stronger at lower redshift. However, the scatter in accretion rates is very large for satellites. This is (at least in part) due to the variation in the halocentric radius, since gas accretion is more suppressed at smaller radii. Central galaxies are influenced less strongly by their environment and exhibit less scatter in their gas accretion rates. The star formation rates of both centrals and satellites show similar behaviour to their gas accretion rates. The relatively small differences between gas accretion and star formation rates demonstrate that galaxies generally exhaust their gas reservoir somewhat faster at higher stellar mass, lower redshift, and in denser environments. We conclude that the environmental suppression of gas accretion could directly result in the quenching of star formation.
Citation
van de Voort, F., Bahé, Y., Bower, R., Correa, C., Crain, R., Schaye, J., & Theuns, T. (2017). The environmental dependence of gas accretion onto galaxies: quenching satellites through starvation. Monthly Notices of the Royal Astronomical Society, 466(3), 3460-3471. https://doi.org/10.1093/mnras/stw3356
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 21, 2016 |
Online Publication Date | Dec 23, 2016 |
Publication Date | Apr 21, 2017 |
Deposit Date | Feb 27, 2017 |
Publicly Available Date | Mar 29, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 466 |
Issue | 3 |
Pages | 3460-3471 |
DOI | https://doi.org/10.1093/mnras/stw3356 |
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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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