{
  "abstract": "We present a study of the interstellar molecular and atomic gas associated with the gamma-ray supernova remnant (SNR) RCW 103 using the Mopra $^{12}$CO($J$ = 1-0), Atacama Large Millimeter/submillimeter Array $^{13}$CO($J$ = 1-0), and the Australia Telescope Compact Array & Parkes HI data. We find that CO clouds in the velocity range from $-58.7$ to $-43.5$ km s$^{-1}$ show a clear spatial correspondence with the X-ray shell of RCW 103, particularly extending from the northwestern to the southeastern regions. The position-velocity diagram of the CO emission reveals an expanding gas motion with an expansion velocity of $ΔV \\sim$$7.5$ km s$^{-1}$, which may have been produced by shock waves and/or stellar winds from the progenitor system. We estimate the total cosmic-ray proton energy to be $\\sim$$3.0^{+1.1}_{-0.6} \\times 10^{47}$ erg, adopting a total interstellar proton density of $\\sim$$810$ cm$^{-3}$. This value is more than an order of magnitude lower than those inferred for other gamma-ray emitting SNRs of comparable age. Given that a substantial amount of dense gas remains within the interior of RCW 103, where thermal X-ray emission is dominant, our results possibly suggest that a significant fraction of the shock energy may have been converted into thermal energy via gas heating, thereby reducing the efficiency of cosmic-ray acceleration.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.24187",
  "author_total": 18,
  "authors": [
    {
      "name": "H. Inoue"
    },
    {
      "name": "Y. Asano"
    },
    {
      "name": "R. G. Bhuvana"
    },
    {
      "name": "R. Z. Alsaberi"
    },
    {
      "name": "R. Yamada"
    },
    {
      "name": "K. Tsuge"
    },
    {
      "name": "T. Murase"
    },
    {
      "name": "Y. Fukui"
    },
    {
      "name": "E. M. Reynoso"
    },
    {
      "name": "K. Tachihara"
    },
    {
      "name": "N. Izumi"
    },
    {
      "name": "M. Yamagishi"
    },
    {
      "name": "K. Furuya"
    },
    {
      "name": "N. Harada"
    },
    {
      "name": "K. Tokuda"
    },
    {
      "name": "G. Rowell"
    },
    {
      "name": "M. D. Filipović"
    },
    {
      "name": "H. Sano"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d3xxj9fbvnn2k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.24187",
  "fulltext_url": null,
  "id": "d3xxj9fbvnn2k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.24187",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2608.24187",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d3xxj9fbvnn2k.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2608.24187",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.24187"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Molecular and Atomic Gas Associated with the Gamma Ray Supernova Remnant RCW 103",
  "title_text": "Molecular and Atomic Gas Associated with the Gamma Ray Supernova Remnant RCW 103",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/d3xxj9fbvnn2k",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/1538-4357/ae9d56",
      "pid": "9cpdpee8xfhs8",
      "relation": "published-as",
      "title": "Molecular and Atomic Gas Associated with the Gamma Ray Supernova Remnant RCW 103",
      "venue": "The Astrophysical Journal"
    }
  ]
}