Journal article

The imprint of cosmic reionization on galaxy clustering

J Stuart B Wyithe, Abraham Loeb

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2007

Abstract

We consider the effect of reionization on the clustering properties of galaxy samples at intermediate redshifts (z ∼ 0.3-5.5). Current models for the reionization of intergalactic hydrogen predict that overdense regions will be reionized early, thus delaying the build-up of stellar mass in the progenitors of massive lower redshift galaxies. As a result, the stellar populations observed in intermediate-redshift galaxies are somewhat younger and hence brighter in overdense regions of the Universe. Galaxy surveys would therefore be sensitive to galaxies with a somewhat lower dark matter mass in overdense regions. The corresponding increase in the observed number density of galaxies can be param..

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University of Melbourne Researchers