{
  "id": "2202.07676",
  "version": "v1",
  "published": "2022-02-15T19:00:12.000Z",
  "updated": "2022-02-15T19:00:12.000Z",
  "title": "Signatures of a surviving helium-star companion in Type Ia supernovae and constraints on the progenitor companion of SN 2011fe",
  "authors": [
    "Zheng-Wei Liu",
    "Friedrich K. Roepke",
    "Yaotian Zeng"
  ],
  "comment": "14 pages, 8 figures, 1 table, accepted for publication in ApJ",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE"
  ],
  "abstract": "Single-degenerate (SD) binary systems composed of a white dwarf and a non-degenerate helium (He)-star companion have been proposed as the potential progenitors of Type Ia supernovae (SNe Ia). The He-star companions are expected to survive the SN Ia explosion in this SD progenitor model. In the present work, we map the surviving He-star companion models computed from our previous three-dimensional hydrodynamical simulations of ejecta-companion interaction into the one-dimensional stellar evolution code MESA to follow their long-term evolution to make predictions on their post-impact observational properties, which can be helpful for searches of such surviving He-star companions in future observations. By comparing with the very late-epoch light curve of the best observed SN Ia, SN 2011fe, we find that our surviving He-star companions become significantly more luminous than SN 2011fe about 1000d after the maximum light. This suggests that a He star is very unlikely to be a companion to the progenitor of SN 2011fe.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-02-15T19:00:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "type ia supernovae",
      "sn 2011fe",
      "surviving helium-star companion",
      "surviving he-star companion",
      "progenitor companion"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}