{
  "id": "0707.0003",
  "version": "v1",
  "published": "2007-06-29T20:01:19.000Z",
  "updated": "2007-06-29T20:01:19.000Z",
  "title": "The Spatial Structure of An Accretion Disk",
  "authors": [
    "Shawn Poindexter",
    "Nicholas Morgan",
    "Christopher S. Kochanek"
  ],
  "comment": "5 pages, 4 figures, submitted to ApJ",
  "doi": "10.1086/524190",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Based on the microlensing variability of the two-image gravitational lens HE1104-1805 observed between 0.4 and 8 microns, we have measured the size and wavelength-dependent structure of the quasar accretion disk. Modeled as a power law in temperature, T proportional to R^-beta, we measure a B-band (0.13 microns in the rest frame) half-light radius of R_{1/2,B} = 6.7 (+6.2 -3.2) x 10^15 cm (68% CL) and a logarithmic slope of beta=0.61 (+0.21 -0.17) for our standard model with a logarithmic prior on the disk size. Both the scale and the slope are consistent with simple thin disk models where beta=3/4 and R_{1/2,B} = 5.9 x 10^15 cm for a Shakura-Sunyaev disk radiating at the Eddington limit with 10% efficiency. The observed fluxes favor a slightly shallower slope, beta=0.55 (+0.03 -0.02), and a significantly smaller size for beta=3/4.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-06-29T20:01:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spatial structure",
      "simple thin disk models",
      "quasar accretion disk",
      "two-image gravitational lens",
      "standard model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2008,
      "month": "Jan",
      "volume": 673,
      "number": 1,
      "pages": 34
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 754545,
      "adsabs": "2008ApJ...673...34P"
    }
  }
}