A.S. Font
The colours of satellite galaxies in groups and clusters
Font, A.S.; Bower, R.G.; McCarthy, I.G.; Benson, A.J.; Frenk, C.S.; Helly, J.C.; Lacey, C.G.; Baugh, C.M.; Cole, S.
Authors
R.G. Bower
I.G. McCarthy
A.J. Benson
Professor Carlos Frenk c.s.frenk@durham.ac.uk
Professor
J.C. Helly
Professor Cedric Lacey cedric.lacey@durham.ac.uk
Professor
Professor Carlton Baugh c.m.baugh@durham.ac.uk
Professor
Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology
Abstract
Current models of galaxy formation predict satellite galaxies in groups and clusters that are redder than observed. We investigate the effect on the colours of satellite galaxies produced by the ram-pressure stripping of their hot-gaseous atmospheres as the satellites orbit within their parent halo. We incorporate a model of the stripping process based on detailed hydrodynamic simulations within the Durham semi-analytic model of galaxy formation. The simulations show that the environment in groups and clusters is less aggressive than previously assumed. The main uncertainty in the model is the treatment of gas expelled by supernovae. With reasonable assumptions for the stripping of this material, we find that satellite galaxies are able to retain a significant fraction of their hot gas for several Gyr, thereby replenishing their reservoirs of cold, star-forming gas and remaining blue for a relatively long period of time. A bimodal distribution of galaxy colours, similar to that observed in Sloan Digital Sky Survey data, is established and the colours of the satellite galaxies are in good agreement with the data. In addition, our model naturally accounts for the observed dependence of satellite colours on environment, from small groups to high-mass clusters.
Citation
Font, A., Bower, R., McCarthy, I., Benson, A., Frenk, C., Helly, J., …Cole, S. (2008). The colours of satellite galaxies in groups and clusters. Monthly Notices of the Royal Astronomical Society, 389(4), 1619-1629. https://doi.org/10.1111/j.1365-2966.2008.13698.x
Journal Article Type | Article |
---|---|
Publication Date | Oct 1, 2008 |
Deposit Date | Jan 31, 2012 |
Publicly Available Date | Jan 4, 2013 |
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 | 389 |
Issue | 4 |
Pages | 1619-1629 |
DOI | https://doi.org/10.1111/j.1365-2966.2008.13698.x |
Keywords | Galaxies, Clusters, Evolution, Fundamental parameter, Luminosity function, Mass. |
Public URL | https://durham-repository.worktribe.com/output/1485967 |
Files
Published Journal Article
(782 Kb)
PDF
Copyright Statement
This article has been published in the Monthly Notices of the Royal Astronomical Society
© 2008 The Authors.
Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
arXiv version
(418 Kb)
PDF
Copyright Statement
arXiv version
You might also like
The impact and response of mini-haloes and the interhalo medium on cosmic reionization
(2024)
Journal Article
The FLAMINGO project: revisiting the S8 tension and the role of baryonic physics
(2023)
Journal Article
Where shadows lie: reconstruction of anisotropies in the neutrino sky
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search