{
  "abstract": "Young massive stellar clusters have been recognized as a significant population of cosmic ray accelerators and gamma-ray sources. We report the detection of extended gamma-ray emission toward the young massive star cluster Berkeley 87 using 18 years of Fermi-LAT data. The hadronic scenario is favored given the dense gas and the cluster's strong stellar winds. The cluster can supply sufficient energy to power the observed gamma-ray emission. A nearby pulsar, PSR J2021+3651, associated with the Dragonfly pulsar wind nebula and the 4HWC source 4HWC J2021+3650, lies in the same field of view. We also discuss the maximum accelerated proton energy and electron energy density of this pulsar.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: 2026MNRAS.tmp.1572O",
  "arxiv": "2605.17636",
  "author_total": 2,
  "authors": [
    {
      "name": "Ziwei Ou"
    },
    {
      "name": "Xiaolong Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4vr49yhehya07.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.17636",
  "fulltext_url": null,
  "id": "4vr49yhehya07",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.17636",
  "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.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.17636",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4vr49yhehya07.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2605.17636",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.17636"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87",
  "title_text": "Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/4vr49yhehya07",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1093/mnras/stag1680",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}