{
  "abstract": "We present a class of horizonless, regular ultra-compact objects arising in a theory of gravity that allows curvature-fluid coupling. The non-minimal interaction between fluid variables and the Ricci scalar generates a vacuum-like equation of state in the interior, while the exterior remains exactly Schwarzschild. The two spacetimes are glued through a thin shell at the junction. The interior metric is non-singular, the shell acquires a stiff-matter equation of state, and near-horizon compactness allows the configuration to mimic black-hole phenomenology without an event horizon. For radii in the astrophysically motivated range $5$--$7$ km, imposed as an external input rather than predicted by the theory, the model's mass-compactness relation maps this radius window onto a mass window of $1.4$-$2.1 M_\\odot$ for a suitable choice of the curvature-fluid coupling coefficient. We carry out a detailed stability analysis of the shell in the frozen-bulk approximation, identify the compactness window in which the interior is everywhere regular and the shell is stable, and quantify the accuracy of the frozen-bulk approximation through an explicit adiabaticity parameter. We then develop the surface thermodynamics of the shell assuming a first order phase transition-like origin of the ultra-compact object. This idea then gives rise to shell temperature and radiation, the shell temperature scaling $T_Σ\\propto M^{-1/2}$ turns out to be a falsifiable predictions of the model.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.19291",
  "author_total": 3,
  "authors": [
    {
      "name": "Debanjan Debnath"
    },
    {
      "name": "Rikpratik Sengupta"
    },
    {
      "name": "Kaushik Bhattacharya"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/187x85gfewy0s.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.19291",
  "fulltext_url": null,
  "id": "187x85gfewy0s",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.19291",
  "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"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7165198635",
  "pdf_url": "https://arxiv.org/pdf/2606.19291",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/187x85gfewy0s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2606.19291",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.19291"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "A Potential Black Hole Mimicker From Non-Minimal Coupling",
  "title_text": "A Potential Black Hole Mimicker From Non-Minimal Coupling",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/187x85gfewy0s",
  "venue": "arXiv",
  "versions": []
}