{
  "abstract": "We investigate strong cosmic censorship (SCC) for massless scalar perturbations of electrically neutral black holes immersed in a Chaplygin-like dark fluid (CDF). The matter distribution produces an asymptotically de Sitter exterior while supporting an inner Cauchy horizon. We derive a closed-form parametrization of the extremal and Nariai horizon boundaries. This analytic control yields explicit near-extremal asymptotics for the horizon splitting and Cauchy-horizon surface gravity, together with an analytic expression for the leading near-extremal scalar quasinormal spectrum. The fundamental near-extremal damping rate approaches the Cauchy-horizon surface gravity, whereas higher angular multipoles retain explicit dependence on the CDF extremal geometry. Combining these analytic results with global quasinormal-mode calculations, we determine the spectral gap and assess the Christodoulou formulation of SCC throughout the three-horizon domain. Potential SCC violation is confined to a narrow region near extremality. As the effective cosmological scale increases, the lower boundary of this region is controlled successively by de Sitter, photon-sphere, and de Sitter modes, while its normalized width varies nonmonotonically.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.00980",
  "author_total": 4,
  "authors": [
    {
      "name": "Hao-Peng Yan"
    },
    {
      "name": "Zeng-Yi Zhang"
    },
    {
      "name": "Xiang-Qian Li"
    },
    {
      "name": "Xiao-Jun Yue"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/at2g0rnhj79ka.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.00980",
  "fulltext_url": null,
  "id": "at2g0rnhj79ka",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.00980",
  "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": "W7206161534",
  "pdf_url": "https://arxiv.org/pdf/2609.00980",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/at2g0rnhj79ka.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "2609.00980",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.00980"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Near-extremal asymptotics and strong cosmic censorship for black holes immersed in a Chaplygin-like dark fluid",
  "title_text": "Near-extremal asymptotics and strong cosmic censorship for black holes immersed in a Chaplygin-like dark fluid",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:00Z",
  "url": "https://research.draconitic.com/paper/at2g0rnhj79ka",
  "venue": "arXiv",
  "versions": []
}