{
  "abstract": "We present molecular emission line data from the massive young stellar object (MYSO) G28.28-0.36 (G28.28) obtained with the Atacama Large Millimeter/submillimeter Array Band 3. Cyanopolyynes (HC$_3$N and HC$_5$N) and three complex organic molecules (COMs; CH$_3$OH, CH$_3$CN, and CH$_3$CHO) are detected from the MYSO G28.28. In addition, strong emission regions of cyanopolyynes are identified between G28.28 and a nearby ultracompact H II region. The HC$_5$N emission is coincident with the dust continuum peak, where an excitation temperature of 100 K is derived from CH$_3$CN. These results suggest that the Hot Carbon Chain Chemistry (HCCC) mechanism produces cyanopolyynes in the hot region around G28.28. We find that G28.28 exhibits a unique chemical feature: cyanopolyynes are abundant, but COMs are deficient, unlike the other MYSOs studied previously. These results imply that G28.28 is a counterpart of the Warm Carbon Chain Chemistry (WCCC) low-mass source L1527. G28.28 is the first HCCC source identified so far.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.30654",
  "author_total": 9,
  "authors": [
    {
      "name": "Kotomi Taniguchi"
    },
    {
      "name": "Masao Saito"
    },
    {
      "name": "Prasanta Gorai"
    },
    {
      "name": "Olli Sipilä"
    },
    {
      "name": "Kazuhito Dobashi"
    },
    {
      "name": "Paola Caselli"
    },
    {
      "name": "Tirupati Kumara Sridharan"
    },
    {
      "name": "Tomomi Shimoikura"
    },
    {
      "name": "Jonathan C. Tan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/85tjnxnrg7we2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.30654",
  "fulltext_url": null,
  "id": "85tjnxnrg7we2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.30654",
  "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.SR"
    ],
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W7214674539",
  "pdf_url": "https://arxiv.org/pdf/2609.30654",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/85tjnxnrg7we2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:52Z",
      "native_id": "2609.30654",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.30654"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "A Cyanopolyyne-rich but COM-poor Massive Protostar: The First Hot Carbon Chain Chemistry Source G28.28-0.36",
  "title_text": "A Cyanopolyyne-rich but COM-poor Massive Protostar: The First Hot Carbon Chain Chemistry Source G28.28-0.36",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:52Z",
  "url": "https://research.draconitic.com/paper/85tjnxnrg7we2",
  "venue": "arXiv",
  "versions": []
}