{
  "id": "2212.00097",
  "version": "v1",
  "published": "2022-11-30T20:08:58.000Z",
  "updated": "2022-11-30T20:08:58.000Z",
  "title": "High-Resolution Spectra of Supernova Remnants in M83",
  "authors": [
    "P. Frank Winkler",
    "Knox S. Long",
    "William P. Blair",
    "Sean D. Points"
  ],
  "comment": "39 pages, including 9 figures (some with multiple sub-figures) and 6 tables",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE",
    "astro-ph.SR"
  ],
  "abstract": "In order to better characterize the rich supernova remnant (SNR) population of M83 (NGC 5236), we have obtained high-resolution (about 85 km/s) spectra of 119 of the SNRs and SNR candidates in M83 with Gemini/GMOS, as well as new spectra of the young SNRs B12-174a and SN1957D. Most of the SNRs and SNR candidates have [S II]:H{\\alpha} ratios that exceed 0.4. Combining these results with earlier studies we have carried out with MUSE and at lower spectroscopic resolution with GMOS, we have confirmed a total of 238 emission nebulae to be SNRs on the basis of their [S II]:H{\\alpha} ratios, about half of which have emission lines that show velocity broadening greater than 100 km/s, providing a kinematic confirmation that they are SNRs and not H II regions. Looking at the entire sample, we find a strong correlation between velocity widths and the line ratios of [O I]{\\lambda}6300:H{\\alpha}, [N II]{\\lambda}6584:H{\\alpha} and [S II]{\\lambda}{\\lambda}6716,6731:H{\\alpha}. The density-sensitive [S II]{\\lambda}6716:{\\lambda}6731 line ratio is strongly correlated with SNR diameter, but not with the velocity width. We discuss these results in the context of previously published shock models.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-11-30T20:08:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high-resolution spectra",
      "snr candidates",
      "line ratio",
      "velocity width",
      "young snrs b12-174a"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 39,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}