{
  "id": "astro-ph/0306331",
  "version": "v1",
  "published": "2003-06-17T10:01:37.000Z",
  "updated": "2003-06-17T10:01:37.000Z",
  "title": "Chandra observation of the core of the galaxy cluster AWM7",
  "authors": [
    "T. Furusho",
    "N. Y. Yamasaki",
    "T. Ohashi"
  ],
  "comment": "12 pages, 7 figures (including color), accepted for publication in ApJ. Postscript is also available at http://www-x.phys.metro-u.ac.jp/~furusho/papers.html",
  "journal": "Astrophys.J. 596 (2003) 181-189",
  "doi": "10.1086/377532",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We present results from a Chandra observation of the core region of the nearby X-ray bright galaxy cluster AWM7. There are blob-like substructures, which are seen in the energy band 2--10 keV, within 10 kpc (20'') of the cD galaxy NGC1129, and the brightest sub-peak has a spatial extent more than 4 kpc. We also notice that the central soft X-ray peak is slightly offset from the optical center by 1 kpc. These structures have no correlated features in optical, infrared, or radio band. Energy spectrum of the hard sub-peak indicates a temperature higher than 3 keV with a metallicity less than 0.3 solar, or a power-law spectrum with photon index 1.2. A hardness ratio map and a narrow Fe-K band image jointly indicate two Fe-rich blobs symmetrically located around the cD galaxy, with the direction perpendicular to the sub-peak direction. In larger scales (r<60 kpc), the temperature gradually drops from 4 keV to 2 keV toward the cluster center and the metal abundance rises steeply to a peak of 1.5 solar at r=7 kpc. These results indicate that a dynamical process is going on in the central region of AWM7, which probably creates heated gas blobs and drives metal injection.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-06-17T10:01:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "chandra observation",
      "creates heated gas blobs",
      "fe-k band image",
      "x-ray bright galaxy cluster awm7",
      "nearby x-ray bright galaxy cluster"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 621294
    }
  }
}