The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies as a Function of Luminosity at z = 1
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 ~(1-3)×1012 h-1 Msolar.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2006
- DOI:
- 10.1086/503601
- arXiv:
- arXiv:astro-ph/0512233
- Bibcode:
- 2006ApJ...644..671C
- Keywords:
-
- Galaxies: High-Redshift;
- Cosmology: Large-Scale Structure of Universe;
- Astrophysics
- E-Print:
- 6 pages, 6 figures, emulateapj format, accepted to ApJ