English

Testing subhalo abundance matching from redshift-space clustering

Astrophysics of Galaxies 2015-03-16 v1 Cosmology and Nongalactic Astrophysics

Abstract

We present a first application of the subhalo abundance matching (SHAM) method to describe the redshift-space clustering of galaxies including the non-linear redshift-space distortion, i.e., the Fingers-of-God. We find that the standard SHAM connecting the luminosity of galaxies to the maximum circular velocity of subhalos well reproduces the luminosity dependence of redshift-space clustering of galaxies in the Sloan Digital Sky Survey in a wide range of scales from 0.3 to 40 Mpc/h. The result indicates that the SHAM approach is very promising for establishing a theoretical model of redshift-space galaxy clustering without additional parameters. We also test color abundance matching using two different proxies for colors: subhalo age and local dark matter density following the method by Masaki et al. (2013b). Observed clustering of red galaxies exhibits much stronger Fingers-of-God effect than blue galaxies. We find that the subhalo age model describes the observed color-dependent redshift-space clustering much better than the local dark matter density model. The result infers that the age of subhalos is a key ingredient to determine the color of galaxies.

Keywords

Cite

@article{arxiv.1503.03973,
  title  = {Testing subhalo abundance matching from redshift-space clustering},
  author = {Mikito Yamamoto and Shogo Masaki and Chiaki Hikage},
  journal= {arXiv preprint arXiv:1503.03973},
  year   = {2015}
}

Comments

10 pages, 8 figures

R2 v1 2026-06-22T08:51:59.829Z