The real-space clustering of luminous red galaxies around z<0.6 quasars in the Sloan Digital Sky Survey

Details The real-space clustering of luminous red galaxies around z<0.6 quasars in the Sloan Digital Sky Survey The real-space clustering of luminous red galaxies around z<0.6 quasars in the Sloan Digital Sky Survey

2008-02-14

arxiv.org/abs/0802.2105v2

Astronomy and Astrophysics

Astrophysics

16 pages, 11 figures, submitted to MNRAS

Scientific paper

We measure the clustering of a sample of photometrically selected luminous red galaxies around a low redshift (0.2~ 10^{12} h^{-1} M_sun, Eddington ratios from 0.01 to 1 and lifetimes less than 10^{7} yr. Using simple models of halo occupation, these correspond to a number density of quasar hosts greater than 10^{-3} h^{3} Mpc^{-3} and stellar masses less than 10^{11} h^{-1} M_sun. The small-scale clustering signal can be interpreted with the aid of our mock LRG catalogs, and depends on the manner in which quasars inhabit halos. We find that our small scale measurements are inconsistent with quasar positions being randomly subsampled from halo centers above a mass threshold, requiring a satellite fraction > 25 per cent.

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