BINARY QUASARS AT HIGH REDSHIFT. II. SUB-Mpc CLUSTERING AT z {approx} 3-4
- Princeton University Observatory, Princeton, NJ 08544 (United States)
- Department of Astronomy, Campbell Hall, University of California, Berkeley, CA 94720 (United States)
- Max-Planck-Instituet fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85748, Garching (Germany)
- Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801 (United States)
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States)
- Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
- Institutuet fuer Theoretische Astrophysik, Zentrum fuer Astronomie der Universitaet Heidelberg Albert-Ueberle-Str. 2, 69120 Heidelberg (Germany)
- Department of Astronomy and Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802 (United States)
- Astronomy Department, Ohio State University, Columbus, OH 43210 (United States)
We present measurements of the small-scale (0.1 {approx}< r {approx}< 1 h {sup -1} Mpc) 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. The amplitude of the small-scale clustering increases from z {approx} 3 to z {approx} 4. The small-scale clustering amplitude is comparable to or lower than power-law extrapolations (assuming a fixed 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. We found that the level of small-scale clustering favors an active fraction of black holes in (M {approx}> 10{sup 13} h {sup -1} M {sub sun}) satellite halos f{sub s} {approx}> 0.1 at z {approx}> 3.
- OSTI ID:
- 21457053
- Journal Information:
- Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 719; ISSN ASJOAB; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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