The evolution of the galaxy content of dark matter haloes

Contreras, S.; Zehavi, I.; Baugh, C.M.; Padilla, N.; Norberg, P.

doi:10.1093/mnras/stw2826

The evolution of the galaxy content of dark matter haloes

Contreras, S.; Zehavi, I.; Baugh, C.M.; Padilla, N.; Norberg, P.

Authors

S. Contreras

I. Zehavi

Professor Carlton Baugh c.m.baugh@durham.ac.uk
Professor

N. Padilla

Professor Peder Norberg peder.norberg@durham.ac.uk
Professor

Abstract

We use the halo occupation distribution (HOD) framework to characterize the predictions from two independent galaxy formation models for the galactic content of dark matter haloes and its evolution with redshift. Our galaxy samples correspond to a range of fixed number densities defined by stellar mass and span 0 ≤ z ≤ 3. We find remarkable similarities between the model predictions. Differences arise at low galaxy number densities which are sensitive to the treatment of heating of the hot halo by active galactic nuclei. The evolution of the form of the HOD can be described in a relatively simple way, and we model each HOD parameter using its value at z = 0 and an additional evolutionary parameter. In particular, we find that the ratio between the characteristic halo masses for hosting central and satellite galaxies can serve as a sensitive diagnostic for galaxy evolution models. Our results can be used to test and develop empirical studies of galaxy evolution, and can facilitate the construction of mock galaxy catalogues for future surveys.

Citation

Contreras, S., Zehavi, I., Baugh, C., Padilla, N., & Norberg, P. (2017). The evolution of the galaxy content of dark matter haloes. Monthly Notices of the Royal Astronomical Society, 465(3), 2833-2848. https://doi.org/10.1093/mnras/stw2826

Journal Article Type	Article
Acceptance Date	Nov 1, 2016
Online Publication Date	Dec 14, 2016
Publication Date	Mar 1, 2017
Deposit Date	Mar 30, 2017
Publicly Available Date	Mar 31, 2017
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	465
Issue	3
Pages	2833-2848
DOI	https://doi.org/10.1093/mnras/stw2826

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This article has been published 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.