The VIMOS-VLT Deep Survey: Dependence of Galaxy Clustering on Luminosity
Abstract
We have investigated the dependence of galaxy clustering on their intrinsic luminosities at z ~ 1, using the data from the First Epoch VIMOS-VLT Deep Survey (VVDS). We have measured the projected two-point correlation function of galaxies, w_p(r_p), for a set of volume-limited samples at an effective redshift <z>=0.9 and median absolute magnitude -19.6< M_B < -21.3. We find that the clustering strength is rising around M_B^*, apparently with a sharper turn than observed at low redshifts. The slope of the correlation function is observed to steepen significantly from \gamma=1.6^{+0.1}_{-0.1} to \gamma=2.4^{+0.4}_{-0.2}. This is due to a significant change in the shape of w_p(r_p), increasingly deviating from a power-law for the most luminous samples, with a strong upturn at small (< 1-2 h^{-1} Mpc) scales. This trend, not observed locally, also results in a strong scale dependence of the relative bias, b/b* and possibly imply a significant change in the way luminous galaxies trace dark-matter halos at z ~ 1 with respect to z ~ 0.
Keywords
Cite
@article{arxiv.astro-ph/0612313,
title = {The VIMOS-VLT Deep Survey: Dependence of Galaxy Clustering on Luminosity},
author = {A. Pollo and L. Guzzo and O. Le Fevre and B. Meneux and the VVDS team},
journal= {arXiv preprint arXiv:astro-ph/0612313},
year = {2007}
}
Comments
2 pages, 2 figures, to appear in the proceedings of the "Cosmic Frontiers" conference, Durham, August 2006