{
  "id": "astro-ph/0410327",
  "version": "v1",
  "published": "2004-10-13T09:11:50.000Z",
  "updated": "2004-10-13T09:11:50.000Z",
  "title": "Collisions Between Single Stars in Dense Clusters: Runaway Formation of a Massive Object",
  "authors": [
    "Marc Freitag",
    "M. Atakan Gürkan",
    "Frederic A. Rasio"
  ],
  "comment": "6 pages, 5 figures, Invited talk at \"Massive Stars in Interacting Binaries\" (Lac Sacacomie, Quebec, 16-20 Aug 2004)",
  "journal": "Massive Stars in Interactive Binaries, ASP Conference Series 367, Astronomical Society of the Pacific, 2007., p.707",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Using Monte Carlo codes, we follow the collisional evolution of clusters in a variety of scenarios. We consider the conditions under which a cluster of main sequence stars may undergo rapid core collapse due to mass segregation, thus entering a phase of runaway collisions, forming a very massive star (VMS, M >= 1000 Msun) through repeated collisions between single stars. Although collisional mass loss is accounted for realistically, we find that a VMS forms even in proto-galactic nuclei models with a high velocity dispersion (many 100 km/s). Such a VMS may be a progenitor for an intermediate-mass black hole (M >= 100 Msun). In contrast, in galactic nuclei hosting a central massive black hole, collisions are found to be disruptive. The stars which are subject to collisions are progressively ground down by high-velocity collisions and a merger sequence appears impossible.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-10-13T09:11:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "single stars",
      "collisions",
      "dense clusters",
      "runaway formation",
      "massive object"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 661763
    }
  }
}