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The evolution of the galaxy content of dark matter haloes.

Contreras, S. and Zehavi, I. and Baugh, C.M. and Padilla, N. and Norberg, P. (2017) 'The evolution of the galaxy content of dark matter haloes.', Monthly notices of the Royal Astronomical Society., 465 (3). pp. 2833-2848.


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.

Item Type:Article
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Publisher statement: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.
Date accepted:01 November 2016
Date deposited:31 March 2017
Date of first online publication:14 December 2016
Date first made open access:31 March 2017

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