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 for L < 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 < 1 h-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 ~ × 1012 h-1 M☉.
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