{
  "id": "1904.11840",
  "version": "v1",
  "published": "2019-04-26T13:36:26.000Z",
  "updated": "2019-04-26T13:36:26.000Z",
  "title": "X-ray transients after the accretion-induced collapse of white dwarfs",
  "authors": [
    "Yun-Wei Yu",
    "Aming Chen",
    "Xiang-Dong Li"
  ],
  "comment": "7 pages, 6 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The accretion-induced collapse (AIC) of a white dwarf in a binary with a non-degenerate companion can sometimes lead to the formation of a rapidly-rotating and highly magnetized neutron star (NS). The spin-down of this NS can drive a powerful pulsar wind (PW) and bring out some detectable multi-wavelength emissions. On the one hand, the PW can evaporate the companion in a few days to form a torus surrounding the NS. Then, due to the blockage of the PW by the torus, a reverse shock can be formed in the wind to generate intense hard X-rays. This emission component will disappear in a few weeks, after the torus is broken down at its inner boundary and scoured into a very thin disk. On the other hand, the interaction between the PW with an AIC ejecta can leads to a termination shock of the wind, which can produce a long-lasting soft X-ray emission component. In any case, the high-energy emissions from deep inside the system can be detected only after the AIC ejecta becomes transparent for X-rays. Meanwhile, by absorbing the X-rays, the AIC ejecta can be heated effectively and generate a fast-evolving and luminous UV/optical transient. Therefore, the predicted hard and soft X-ray emissions, associated by an UV/optical transient, provide a clear observational signature for identifying AIC events in current and future observations (e.g., AT 2018cow).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-04-26T13:36:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "white dwarf",
      "accretion-induced collapse",
      "x-ray transients",
      "aic ejecta",
      "generate intense hard x-rays"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}