Reconstructing the distribution of haloes and mock galaxies below the resolution limit in cosmological simulations

Sylvain de la Torre, John A. Peacock

Research output: Contribution to journalArticlepeer-review

Abstract

We present a method for populating dark matter simulations with haloes of mass below the resolution limit. It is based on stochastically sampling a field derived from the density field of the halo catalogue, using constraints from the conditional halo mass function n(m|{\delta}). We test the accuracy of the method and show its application in the context of building mock galaxy samples. We find that this technique allows precise reproduction of the two-point statistics of galaxies in mock samples constructed with this method. Our results demonstrate that the full information content of a simulation can be communicated efficiently using only a catalogue of the more massive haloes.
Original languageEnglish
Pages (from-to)743-748
JournalMonthly Notices of the Royal Astronomical Society
Volume435
Issue number1
DOIs
Publication statusPublished - 1 Dec 2012

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