{
  "abstract": "Context. Type Ibn supernovae (SNe) are characterized by narrow helium emission lines that arise from ejecta-circumstellar medium interaction, yet their progenitors remain debated, with both massive Wolf-Rayet stars and low-mass helium stars in binaries proposed.\n\nAims. We aim to directly identify the progenitor of the Type Ibn SN 2023fyq and to characterize its environment in order to constrain the progenitor’s nature and evolutionary channel.\n\nMethods. We search for the SN progenitor based on pre-explosion and late-time HST and JWST images and derive its properties by fitting the spectral energy distribution. We investigate the SN environment by probing the stars, dust, ionized gas and molecular gas with a multiwavelength dataset including HST and JWST imaging, VLT/MUSE integral-field-unit spectroscopy, and ALMA CO(2−1) radio interferometry.\n\nResults. We discover a pre-explosion source at the SN position, which is consistent with a hot ( T > 15 000 K) and luminous (log( L / L ⊙ ) ≳ 5.5) SN progenitor and a possible host star cluster. The progenitor is confirmed to have disappeared after the explosion. Analysis of the SN environment implies that the progenitor likely has an age of log( t /yr) = 7.1−7.2. These phenomena disfavor a very massive single-star progenitor and instead support a binary scenario involving a low-mass helium star and a compact object; the observed progenitor emission likely arises from binary interaction that began at least ∼12 yr before the explosion.\n\nConclusions. SN 2023fyq is the first Type Ibn SN with a directly detected progenitor and a possible host star cluster. It adds to the diversity of Type Ibn SNe in terms of their progenitor channels and mass-loss mechanisms.",
  "abstract_shown": true,
  "affiliations": [
    "School of Astronomy and Space Science, University of Chinese Academy of Sciences",
    "National Astronomical Observatories, Chinese Academy of Sciences",
    "Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University",
    "School of Space and Earth Sciences, Beihang University",
    "Kavli Institute for Astronomy and Astrophysics, Peking University",
    "Department of Astronomy, School of Physics, Peking Unversity",
    "Department of Physics, Royal Holloway, University of London",
    "School of Physics and Astronomy, China West Normal University",
    "New Cornerstone Science Laboratory, National Astronomical Observatories, Chinese Academy of Sciences"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 12,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Xinyi Hong",
      "orcid": "0009-0002-2074-0148"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Ning-Chen Sun"
    },
    {
      "affs": [
        3
      ],
      "name": "Yali Shao"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Ke Wang",
      "orcid": "0000-0002-7237-3856"
    },
    {
      "affs": [
        1,
        0
      ],
      "name": "Junjie Wu",
      "orcid": "0009-0008-1004-736X"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Qiang Xi",
      "orcid": "0009-0004-0154-1295"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yi-Han Zhao",
      "orcid": "0009-0005-9841-1434"
    },
    {
      "affs": [
        6
      ],
      "name": "Justyn R. Maund",
      "orcid": "0000-0003-0733-7215"
    },
    {
      "affs": [
        1,
        7
      ],
      "name": "Xiaohan Chen",
      "orcid": "0009-0007-2538-5102"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Anyu Wang",
      "orcid": "0009-0008-0187-0020"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Linxi Zhang"
    },
    {
      "affs": [
        1,
        0,
        2,
        8
      ],
      "name": "Jifeng Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5gw3veerxdtj9.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202660951",
  "fulltext_url": null,
  "id": "5gw3veerxdtj9",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://www.aanda.org/10.1051/0004-6361/202660951",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [],
  "openalex": null,
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-06",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/5gw3veerxdtj9.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T12:20:54Z",
      "native_id": "10.1051/0004-6361/202660951",
      "source": "crossref",
      "url": "https://www.aanda.org/10.1051/0004-6361/202660951"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "SN 2023fyq: Direct detection of a Type Ibn supernova progenitor and its multiwavelength environmental constraints",
  "title_text": "SN 2023fyq: Direct detection of a Type Ibn supernova progenitor and its multiwavelength environmental constraints",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T00:21:24Z",
  "url": "https://research.draconitic.com/paper/5gw3veerxdtj9",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}