{
  "abstract": "We study static, spherically symmetric black holes surrounded by dark matter halos in the presence of a positive cosmological constant. Assuming vanishing radial pressure, we derive the constraints imposed by the null, weak, strong, and dominant energy conditions on the halo matter. The halo is confined to a finite radial interval separated from both horizons, and the total mass is bounded above by the Nariai value. We construct a Hernquist-type profile and study black hole images, showing that a positive cosmological constant can substantially change the images. We also compute scalar quasinormal modes of the Hernquist-type spacetime. When the dark matter mass is sufficiently small, the relative difference of a selected mode is approximately linear in the compactness of the matter halo, i.e., the ratio of mass parameter $M_{\\text{DM}}$ and scale parameter $a$, with a coefficient that depends on the cosmological constant.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.17628",
  "author_total": 6,
  "authors": [
    {
      "name": "Long-Yue Li"
    },
    {
      "name": "Li-Ming Cao"
    },
    {
      "name": "Yungui Gong"
    },
    {
      "name": "Xia-Yuan Liu"
    },
    {
      "name": "Liang-Bi Wu"
    },
    {
      "name": "Wenting Zhou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b2bxgwmfcsn9t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.17628",
  "fulltext_url": null,
  "id": "b2bxgwmfcsn9t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.17628",
  "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",
      "gr-qc"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7221749575",
  "pdf_url": "https://arxiv.org/pdf/2610.17628",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b2bxgwmfcsn9t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:11Z",
      "native_id": "2610.17628",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.17628"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Black holes with dark matter halos and a positive cosmological constant: Energy conditions and signatures",
  "title_text": "Black holes with dark matter halos and a positive cosmological constant: Energy conditions and signatures",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:11Z",
  "url": "https://research.draconitic.com/paper/b2bxgwmfcsn9t",
  "venue": "arXiv",
  "versions": []
}