{
  "id": "astro-ph/0603305",
  "version": "v1",
  "published": "2006-03-13T13:17:34.000Z",
  "updated": "2006-03-13T13:17:34.000Z",
  "title": "Chandra LETG Observations of Supernova Remnant 1987A",
  "authors": [
    "Svetozar A. Zhekov",
    "Richard McCray",
    "Kazimierz J. Borkowski",
    "David N. Burrows",
    "Sangwook Park"
  ],
  "comment": "Accepted for publication in the ApJ",
  "journal": "Astrophys.J. 645 (2006) 293-302",
  "doi": "10.1086/504285",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We discuss the results from deep Chandra LETG observations of the supernova remnant 1987A (SNR 1987A). We find that a distribution of shocks, spanning the same range of velocities (from 300 to 1700 km/s) as deduced in the first part of our analysis (Zhekov et al. 2005, ApJL, 628, L127), can account for the entire X-ray spectrum of this object. The post-shock temperature distribution is bimodal, peaking at kT 0.5 and 3 keV. Abundances inferred from the X-ray spectrum have values similar to those for the inner circumstellar ring, except that the abundances of nitrogen and oxygen are approximately a factor of two lower than those inferred from the optical/UV spectrum. The velocity of the X-ray emitting plasma has decreased since 1999, apparently because the blast wave has entered the main body of the inner circumstellar ring.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-03-13T13:17:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "supernova remnant 1987a",
      "inner circumstellar ring",
      "deep chandra letg observations",
      "entire x-ray spectrum",
      "post-shock temperature distribution"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 712274
    }
  }
}