{
  "id": "1703.04059",
  "version": "v1",
  "published": "2017-03-12T02:26:03.000Z",
  "updated": "2017-03-12T02:26:03.000Z",
  "title": "On the Absence of Non-thermal X-ray emission around Runaway O stars",
  "authors": [
    "J. A. Toalá",
    "L. M. Oskinova",
    "R. Ignace"
  ],
  "comment": "6 pages, 2 tables, 3 figures; Accepted to ApJ Letters",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Theoretical models predict that the compressed interstellar medium around runaway O stars can produce high-energy non-thermal diffuse emission, in particular, non-thermal X-ray and $\\gamma$-ray emission. So far, detection of non-thermal X-ray emission was claimed for only one runaway star AE Aur. We present a search for non-thermal diffuse X-ray emission from bow shocks using archived XMM-Newton observations for a clean sample of 6 well-determined runaway O stars. We find that none of these objects present diffuse X-ray emission associated to their bow shocks, similarly to previous X-ray studies toward $\\zeta$ Oph and BD$+$43$^{\\circ}$3654. We carefully investigated multi-wavelength observations of AE Aur and could not confirm previous findings of non-thermal X-rays. We conclude that so far there is no clear evidence of non-thermal extended emission in bow shocks around runaway O stars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-03-12T02:26:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-thermal x-ray emission",
      "bow shocks",
      "produce high-energy non-thermal diffuse emission",
      "non-thermal diffuse x-ray emission",
      "runaway star ae aur"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}