{
  "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": [
    "National Institutes of Natural Sciences",
    "The Graduate University for Advanced Studies",
    "University of Oslo",
    "Universität Heidelberg",
    "Max-Planck-Institut für extraterrestrische Physik",
    "Tokyo Gakugei University",
    "National Radio Astronomy Observatory",
    "Otsuma Women’s University Chiyoda",
    "Chalmers University of Technology",
    "University of Virginia"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Kotomi Taniguchi",
      "orcid": "0000-0003-4402-6475"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Masao Saito",
      "orcid": "0000-0003-0769-8627"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Prasanta Gorai",
      "orcid": "0000-0003-1602-6849"
    },
    {
      "affs": [
        4
      ],
      "name": "Olli Sipilä",
      "orcid": "0000-0002-9148-1625"
    },
    {
      "affs": [
        5
      ],
      "name": "Kazuhito Dobashi",
      "orcid": "0000-0001-8058-8577"
    },
    {
      "affs": [
        4
      ],
      "name": "Paola Caselli",
      "orcid": "0000-0003-1481-7911"
    },
    {
      "affs": [
        6
      ],
      "name": "Tirupati Kumara Sridharan",
      "orcid": "0000-0001-5921-5784"
    },
    {
      "affs": [
        7
      ],
      "name": "Tomomi Shimoikura",
      "orcid": "0000-0002-1054-3004"
    },
    {
      "affs": [
        8,
        9
      ],
      "name": "Jonathan C. Tan",
      "orcid": "0000-0002-3389-9142"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bwy91jd2y7b2d.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/aeacdb",
  "fulltext_url": null,
  "id": "bwy91jd2y7b2d",
  "issns": [
    "1538-4357",
    "0004-637X"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeacdb",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "feed-journal",
      "astronomy/general"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeacdb/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/bwy91jd2y7b2d.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:20:43Z",
      "native_id": "10.3847/1538-4357/aeacdb",
      "source": "feed-iop",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeacdb"
    },
    {
      "first_seen": "2026-11-02T12:21:56Z",
      "native_id": "10.3847/1538-4357/aeacdb",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeacdb"
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  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "A Cyanopolyyne-rich but Complex-organic-molecule-poor Massive Protostar: The First Hot Carbon-chain Chemistry Source G28.28-0.36",
  "title_text": "A Cyanopolyyne-rich but Complex-organic-molecule-poor Massive Protostar: The First Hot Carbon-chain Chemistry Source G28.28-0.36",
  "type": "peer-reviewed",
  "updated_at": "2026-11-04T00:22:41Z",
  "url": "https://research.draconitic.com/paper/bwy91jd2y7b2d",
  "venue": "The Astrophysical Journal",
  "versions": []
}