{
  "abstract": "Accretion onto magnetically charged black holes in a perfect fluid dark matter (PFDM) background opens a new window for testing strong-field gravity. This paper investigates the radiative properties and optical appearance of a thin accretion disk surrounding a charged-PFDM black hole. We numerically compute the radiative energy flux, temperature distribution, and radiative efficiency, and employ a ray-tracing method to construct the direct images, secondary images, redshift distribution, and observed flux. By comparing with the Schwarzschild and pure PFDM cases, we find that the thin-disk efficiency of the charged-PFDM black hole lies between the two, with the magnetic charge partially counteracting the dark-matter-induced efficiency enhancement; for M87*, the efficiency is estimated to be 7\\%--8\\%. The optical appearance is predominantly governed by the PFDM parameter, while the magnetic charge plays only a marginal role. Larger inclination angles give rise to stronger Doppler asymmetry, producing the characteristic ``hat-like'' shape. These results provide falsifiable predictions for future high-resolution observations, such as those by ngEHT, to distinguish dark-matter environments from magnetic-charge effects.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.31762",
  "author_total": 4,
  "authors": [
    {
      "name": "Taiyang Zhang"
    },
    {
      "name": "Zongyuan Qin"
    },
    {
      "name": "Qian Feng"
    },
    {
      "name": "Zheng-Wen Long"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8c2jnxt0bnwg7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.31762",
  "fulltext_url": null,
  "id": "8c2jnxt0bnwg7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.31762",
  "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.HE"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7214770037",
  "pdf_url": "https://arxiv.org/pdf/2609.31762",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8c2jnxt0bnwg7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.31762",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.31762"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Radiative properties and optical appearance of a thin accretion disk around a charged-PFDM black hole",
  "title_text": "Radiative properties and optical appearance of a thin accretion disk around a charged-PFDM black hole",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/8c2jnxt0bnwg7",
  "venue": "arXiv",
  "versions": []
}