{
  "id": "1705.02339",
  "version": "v1",
  "published": "2017-05-05T18:00:00.000Z",
  "updated": "2017-05-05T18:00:00.000Z",
  "title": "Constraining The Single-Degenerate Channel of Type Ia Supernovae With Stable Iron-Group Elements in SNR 3C 397",
  "authors": [
    "Pranav Dave",
    "Rahul Kashyap",
    "Robert Fisher",
    "Frank Timmes",
    "Dean Townsley",
    "Chris Byrohl"
  ],
  "comment": "22 pages and 8 figures. Accepted for publication in The Astrophysical Journal",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE"
  ],
  "abstract": "Recent Suzaku X-ray spectra of SNR 3C 397 indicate enhanced stable iron-group element abundances of Ni, Mn, Cr, and Fe. Seeking to address key questions about the progenitor and explosion mechanism of 3C 397, we compute nucleosynthetic yields from a suite of multidimensional hydrodynamics models in the near-Chandrasekhar mass, single-degenerate paradigm for supernova Type Ia. Varying the progenitor white dwarf internal structure, composition, ignition, and explosion mechanism, we find the best match to the observed iron-peak elements of 3C 397 are dense (central density $\\ge$ 6$\\times$10$^{9}$ g cm$^{-3}$), low-carbon white dwarfs that undergo a weak, centrally-ignited deflagration, followed by a subsequent detonation. The amount of $^{56}$Ni produced is consistent with a normal or bright normal supernova Type Ia. A pure deflagration of a centrally-ignited, low central density ($\\simeq$ 2$\\times$10$^{9}$ g cm$^{-3}$) progenitor white dwarf, frequently considered in the literature, is also found to produce good agreement with 3C 397 nucleosynthetic yields, but leads to a subluminous SN Ia event, in conflict with X-ray linewidth data. Additionally, in contrast to prior work which suggested a large super-solar metallicity for the white dwarf progenitor for SNR 3C 397, we find satisfactory agreement for solar and sub-solar metallicity progenitors. We discuss a range of implications our results have for the single-degenerate channel.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-05-05T18:00:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "type ia supernovae",
      "snr 3c",
      "single-degenerate channel",
      "normal supernova type ia",
      "white dwarf internal structure"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}