{
  "id": "astro-ph/0507593",
  "version": "v2",
  "published": "2005-07-26T07:24:07.000Z",
  "updated": "2006-05-09T09:43:32.000Z",
  "title": "Core-Collapse Very Massive Stars: Evolution, Explosion, and Nucleosynthesis of Population III 500 -- 1000 $M_{\\odot}$ Stars",
  "authors": [
    "T. Ohkubo",
    "H. Umeda",
    "K. Maeda",
    "K. Nomoto",
    "T. Suzuki",
    "S. Tsuruta",
    "M. J. Rees"
  ],
  "comment": "49 pages, 49 figure files, accepted to ApJ (2006, 645, 2)",
  "journal": "Astrophys.J.645:1352-1372,2006",
  "doi": "10.1086/504578",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We calculate evolution, collapse, explosion, and nucleosynthesis of Population III very-massive stars with 500$M_{\\odot}$ and 1000$M_{\\odot}$. Presupernova evolution is calculated in spherical symmetry. Collapse and explosion are calculated by a two-dimensional code, based on the bipolar jet models. We compare the results of nucleosynthesis with the abundance patterns of intracluster matter, hot gases in M82, and extremely metal-poor stars in the Galactic halo. It was found that both 500$M_{\\odot}$ and 1000$M_{\\odot}$ models enter the region of pair-instability but continue to undergo core collapse. In the presupernova stage, silicon burning regions occupy a large fraction, more than 20% of the total mass. For moderately aspherical explosions, the patterns of nucleosynthesis match the observational data of both intracluster medium and M82. Our results suggest that explosions of Population III core-collapse very-massive stars contribute significantly to the chemical evolution of gases in clusters of galaxies. For Galactic halo stars, our [O/Fe] ratios are smaller than the observational abundances. However, our proposed scenario is naturally consistent with this outcome. The final black hole masses are $\\sim 230M_{\\odot}$ and $\\sim 500M_{\\odot}$ for the $500M_{\\odot}$ and 1000$M_{\\odot}$ models, respectively. This result may support the view that Population III very massive stars are responsible for the origin of intermediate mass black holes which were recently reported to be discovered.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-05-09T09:43:32.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nucleosynthesis",
      "population",
      "very-massive stars contribute",
      "final black hole masses",
      "intermediate mass black holes"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 49,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 688212
    }
  }
}