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

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 M_B = -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 r_p < 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 _⊙.