{
  "abstract": "This Comment clarifies the physical interpretation of the black hole spacetime metric employed by Shaymatov \\textit{et al.} [Phys. Dark Univ. 34 (2021) 100891]. We point out that the metric, originally derived in Li and Yang (2012), describes a specific dual-component system consisting of cold dark matter and a phantom field background. Treating this geometry as a single-component ``Perfect Fluid Dark Matter'' (PFDM) with a total equation of state $w_{\\mathrm{total}} = -1$ is physically incompatible with the gravitational attraction required for dark matter halos. Furthermore, we clarify the distinct parameter regimes of the original model to prevent potential misapplications in extreme astrophysical scenarios.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.34019",
  "author_total": 2,
  "authors": [
    {
      "name": "Ming-Hsun Li"
    },
    {
      "name": "Kwei-Chou Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7da0a4py5ndg3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.34019",
  "fulltext_url": null,
  "id": "7da0a4py5ndg3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.34019",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.34019",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7da0a4py5ndg3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.34019",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.34019"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Comment on \"Effect of perfect fluid dark matter...\" [Phys. Dark Univ. 34 (2021) 100891]",
  "title_text": "Comment on \"Effect of perfect fluid dark matter...\" [Phys. Dark Univ. 34 (2021) 100891]",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/7da0a4py5ndg3",
  "venue": "arXiv",
  "versions": []
}