{
  "abstract": "Superflares are frequently observed on magnetically active stars, particularly on active M-dwarfs, thereby influencing the habitability of nearby exoplanets. However, the causes of superflares remain unclear. Here, combining FAST and TESS, we detected a finely structured decimetric radio burst appearing as groups of spikes during a white-light superflare (total bolometric energy $\\sim 10^{33} \\ \\mathrm{erg}$) on the M-dwarf binary EQ Peg on September 8th, 2022. The most significant ones appeared near the peak time of the optical flare and lasted for about $100 \\ \\mathrm{s}$. The radio spikes present extremely high brightness temperatures ($\\gtrsim 10^{13} \\ \\mathrm{K}$) and high degrees of circular polarization ($\\sim 0.84 \\pm 0.16$), indicating the origin of a coherent emission process, most likely the electron cyclotron maser. Based on Zeeman-Doppler Imaging measurements of EQ Peg, we further locate the sources of the radio spikes, including their heights and latitudes, under the assumption of a large-scale dipolar magnetic field configuration. The results provide strong evidence for finely structured decimetric radio bursts generated by stellar flares and shed light on the origin of superflares.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37909",
  "author_total": 9,
  "authors": [
    {
      "name": "Zhanhao Zhao"
    },
    {
      "name": "Xin Cheng"
    },
    {
      "name": "Yuankun Kou"
    },
    {
      "name": "Guoyin Chen"
    },
    {
      "name": "Hao Ning"
    },
    {
      "name": "Yao Chen"
    },
    {
      "name": "Baolin Tan"
    },
    {
      "name": "Keping Qiu"
    },
    {
      "name": "Mingde Ding"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bnmnycj6sj4ss.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37909",
  "fulltext_url": null,
  "id": "bnmnycj6sj4ss",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37909",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.EP"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.37909",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bnmnycj6sj4ss.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37909",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37909"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Detection of fine-structured radio bursts during a superflare on EQ Peg",
  "title_text": "Detection of fine-structured radio bursts during a superflare on EQ Peg",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/bnmnycj6sj4ss",
  "venue": "arXiv",
  "versions": []
}