{
  "id": "astro-ph/0106553",
  "version": "v1",
  "published": "2001-06-29T10:31:36.000Z",
  "updated": "2001-06-29T10:31:36.000Z",
  "title": "On the metal abundance in the core of M87",
  "authors": [
    "Silvano Molendi",
    "Fabio Gastaldello"
  ],
  "comment": "To appear in A&A Letters",
  "doi": "10.1051/0004-6361:20010871",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We revisit the XMM-Newton observation of M87 to make a new and more detailed measurement of the metal abundance profile. After having verified that spectral fits with single temperature models show a dramatic abundance drop within 1 arcmin of the cluster core, we show that more appropriate models, which include a multi-temperature component to account for the strong temperature gradient observed in M87, and a power-law component to account for the emission of the nucleus and knot A, give a substantially flat abundance profile. The drastic abundance decrement found by fitting a single temperature component to the data is an artifact known as \"Fe-bias\" (Buote 2000a,b) following from the application of an oversimplified spectral model to the data.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-06-29T10:31:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "metal abundance",
      "drastic abundance decrement",
      "strong temperature gradient",
      "dramatic abundance drop",
      "single temperature models"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 576229
    }
  }
}