{
  "id": "1106.2565",
  "version": "v1",
  "published": "2011-06-13T21:18:28.000Z",
  "updated": "2011-06-13T21:18:28.000Z",
  "title": "The Yellow Supergiant Progenitor of the Type II Supernova 2011dh in M51",
  "authors": [
    "J. R. Maund",
    "M. Fraser",
    "M. Ergon",
    "A. Pastorello",
    "S. J. Smartt",
    "J. Sollerman",
    "S. Benetti",
    "M. -T. Botticella",
    "F. Bufano",
    "I. J. Danziger",
    "R. Kotak",
    "L. Magill",
    "A. W. Stephens",
    "S. Valenti"
  ],
  "comment": "Submitted to ApJ Letters - 6 pages, 5 figures",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present the detection of the progenitor of the Type II SN 2011dh in archival pre-explosion Hubble Space Telescope images. Using post-explosion Adaptive Optics imaging with Gemini NIRI+ALTAIR, the position of the SN in the pre-explosion images was determined to within 23mas. The progenitor object was found to be consistent with a F8 supergiant star (log L/L_{\\odot}=4.92+/-0.20 and T_{eff}=6000+/-280K). Through comparison with stellar evolution tracks, this corresponds to a single star at the end of core C-burning with an initial mass of M_{ZAMS}=13+/-3M_{\\odot}. The possibility of the progenitor source being a cluster is rejected, on the basis of: 1) the source is not spatially extended; 2) the absence of excess H\\alpha\\, emission; and 3) the poor fit to synthetic cluster SEDs. It is unclear if a binary companion is contributing to the observed SED, although given the excellent correspondence of the observed photometry to a single star SED we suggest the companion does not contribute significantly. Early photometric and spectroscopic observations show fast evolution similar to the transitional Type IIb SN 2008ax, and suggest that a large amount of the progenitor's hydrogen envelope was removed before explosion.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-06-13T21:18:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "yellow supergiant progenitor",
      "supernova 2011dh",
      "hubble space telescope images",
      "pre-explosion hubble space telescope",
      "transitional type iib sn 2008ax"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/739/2/L37",
      "journal": "The Astrophysical Journal",
      "year": 2011,
      "month": "Oct",
      "volume": 739,
      "number": 2
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 913638,
      "adsabs": "2011ApJ...739L..37M"
    }
  }
}