Binary Quasars at High Redshift II: Sub-Mpc Clustering at z ~ 3-4
Abstract
We present measurements of the small-scale (0.1<~ r <~ 1 Mpc/h) quasar two-point correlation function at z>2.9, for a flux-limited (i<21) sample of 15 binary quasars compiled by Hennawi et al. (2009). The amplitude of the small-scale clustering increases from z ~ 3 to z ~ 4. The small-scale clustering amplitude is comparable to or lower than power-law extrapolations (with slope gamma=2) from the large-scale correlation function of the i<20.2 quasar sample from the Sloan Digital Sky Survey. Using simple prescriptions relating quasars to dark matter halos, we model the observed small-scale clustering with halo occupation models. Reproducing the large-scale clustering amplitude requires that the active fraction of the black holes in the central galaxies of halos is near unity, but the level of small-scale clustering favors an active fraction of black holes in satellite galaxies 0.1 <~ f_s <~ 0.5 at z >~ 3.
Cite
@article{arxiv.0908.3908,
title = {Binary Quasars at High Redshift II: Sub-Mpc Clustering at z ~ 3-4},
author = {Yue Shen and Joseph F. Hennawi and Francesco Shankar and Adam D. Myers and Michael A. Strauss and S. G. Djorgovski and Xiaohui Fan and Carlo Giocoli and Ashish Mahabal and Donald P. Schneider and David H. Weinberg},
journal= {arXiv preprint arXiv:0908.3908},
year = {2015}
}
Comments
Submitted to ApJ