{
  "id": "0908.3908",
  "version": "v1",
  "published": "2009-08-26T21:19:46.000Z",
  "updated": "2009-08-26T21:19:46.000Z",
  "title": "Binary Quasars at High Redshift II: Sub-Mpc Clustering at z ~ 3-4",
  "authors": [
    "Yue Shen",
    "Joseph F. Hennawi",
    "Francesco Shankar",
    "Adam D. Myers",
    "Michael A. Strauss",
    "S. G. Djorgovski",
    "Xiaohui Fan",
    "Carlo Giocoli",
    "Ashish Mahabal",
    "Donald P. Schneider",
    "David H. Weinberg"
  ],
  "comment": "Submitted to ApJ",
  "categories": [
    "astro-ph.CO",
    "astro-ph.GA"
  ],
  "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.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-08-26T21:19:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high redshift",
      "binary quasars",
      "sub-mpc clustering"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/719/2/1693",
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "Aug",
      "volume": 719,
      "number": 2,
      "pages": 1693
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 829588,
      "adsabs": "2010ApJ...719.1693S"
    }
  }
}