{
  "id": "astro-ph/0203374",
  "version": "v1",
  "published": "2002-03-21T18:07:01.000Z",
  "updated": "2002-03-21T18:07:01.000Z",
  "title": "A Chandra observation of the X-ray environment and jet of 3C31",
  "authors": [
    "M. J. Hardcastle",
    "D. M. Worrall",
    "M. Birkinshaw",
    "R. A. Laing",
    "A. H. Bridle"
  ],
  "comment": "11 pages, 10 figures. Accepted for MNRAS: two companion papers to follow",
  "doi": "10.1046/j.1365-8711.2002.05513.x",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We have used a deep Chandra observation of the central regions of the twin-jet FRI radio galaxy 3C31 to resolve the thermal X-ray emission in the central few kiloparsecs of the host galaxy, NGC 383, where the jets are thought to be decelerating rapidly. This allows us to make high-precision measurements of the density, temperature and pressure distributions in this region, and to show that the X-ray emitting gas in the centre of the galaxy has a cooling time of only 5 times 10^7 years. In a companion paper these measurements are used to place constraints on models of the jet dynamics. A previously unknown one-sided X-ray jet in 3C31, extending up to 8 arcsec from the nucleus, is detected and resolved. Its structure and steep X-ray spectrum are similar to those of X-ray jets known in other FRI sources, and we attribute the radiation to synchrotron emission from a high-energy population of electrons. In situ particle acceleration is required in the region of the jet where bulk deceleration is taking place. We also present X-ray spectra and luminosities of the galaxies in the Arp 331 chain of which NGC 383 is a member. The spectrum and spatial properties of the nearby bright X-ray source 1E 0104+3153 are used to argue that the soft X-ray emission is mostly due to a foreground group of galaxies rather than to the background broad absorption-line quasar.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-03-21T18:07:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "chandra observation",
      "x-ray environment",
      "twin-jet fri radio galaxy 3c31",
      "nearby bright x-ray source 1e",
      "background broad absorption-line quasar"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 597073
    }
  }
}