{
  "id": "astro-ph/9906357",
  "version": "v1",
  "published": "1999-06-23T02:24:29.000Z",
  "updated": "1999-06-23T02:24:29.000Z",
  "title": "Temperature Variation in the Cluster of Galaxies Abell 115 Studied with ASCA",
  "authors": [
    "R. Shibata",
    "H. Honda",
    "M. Ishida",
    "T. Ohashi",
    "K. Yamashita"
  ],
  "comment": "23 pages, including 7 Postscript figures, accepted for publication in ApJ",
  "doi": "10.1086/307819",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Abell 115 exhibits two distinct peaks in the surface brightness distribution. ASCA observation shows a significant temperature variation in this cluster, confirmed by a hardness ratio analysis and spectral fits. A linking region between main and sub clusters shows a high temperature compared with other regions. Two possibilities are examined as the cause of the temperature variation: cooling flows in the main cluster and a shock heating due to the collision of the subcluster into the main system. Spectral fits with cooling flow models to the main-cluster data show a mass-deposition rate less than 419 solar-mass/yr. Temperatures in the main cluster, the linking region, and the subcluster are estimated by correcting for the effects of X-ray telescope response as 4.9 (+0.7/-0.6), 11 (+12/-4), and 5.2 (+1.4/-1.0) keV, respectively. The high temperature in the linking region implies that Abell 115 is indeed a merger system, with possible contribution from cooling flows on the temperature structure.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-06-23T02:24:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galaxies abell",
      "cooling flow",
      "linking region",
      "main cluster",
      "high temperature"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 502138
    }
  }
}