The DEEP2 galaxy redshift survey: Clustering of galaxies as a function of luminosity at z = 1

Alison L. Coil, Jeffrey A. Newman, Michael C. Cooper, Marc Davis, S. M. Faber, David C. Koo, Christopher N.A. Willmer

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

We measure the clustering of DEEP2 galaxies at z = 1 as a function of luminosity on scales 0.1-20 h-1 Mpc. Drawing from a parent catalog of 25,000 galaxies at 0.7 < z < 1.3 in the full DEEP2 survey, we create volume-limited samples having upper luminosity limits between MB = -19 and -20.5, roughly 0.2-1L* at z = 1. We find that brighter galaxies are more strongly clustered than fainter galaxies and that the slope of the correlation function does not depend on luminosity fori < L*. The brightest galaxies, with L > L*, have a steeper slope. The clustering scale length, r0, varies from 3.69 ± 0.14 for the faintest sample to 4.43 ± 0.14 for the brightest sample. The relative bias of galaxies as a function of L/L* is steeper than the relation found locally for SDSS galaxies by Zehavi et al. in 2005 over the luminosity range that we sample. The absolute bias of galaxies at z - 1 is scale dependent on scales rp < 1h-1 Mpc, and rises most significantly on small scales for the brightest samples. For a concordance cosmology, the large-scale bias varies from 1.26 ± 0.04 to 1.54 ± 0.05 as a function of luminosity and implies that DEEP2 galaxies reside in dark matter halos with a minimum mass of ∼(1-3) × 1012 h-1 M .

Original languageEnglish (US)
Pages (from-to)671-677
Number of pages7
JournalAstrophysical Journal
Volume644
Issue number2 II
DOIs
StatePublished - Jun 10 2006
Externally publishedYes

Keywords

  • Galaxies: high-redshift
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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