{
  "abstract": "We study inverse source reconstruction in generalized Vaidya spacetimes. A prescribed density fixes the mass and tangential pressure, while a two-sector decomposition determines a dimensionless radial balance function. We distinguish this function from a time-directed conversion rate and identify the additional null-flux information required for a covariant exchange vector. Positivity restricts the allowed target pressures: a de Sitter core cannot be represented by nonnegative sectors with nonnegative tangential equations of state. An explicit finite-density profile admits a positive vacuum-like completion, finite curvature invariants, and inner and outer trapping horizons above a calculable threshold. Its total source satisfies the null, weak, and dominant energy conditions during monotonic accretion, while the timelike convergence condition fails in the core. We check polytropic, bag-model-inspired, and condensate-inspired profiles and the corresponding cosmological reconstruction. Finally, we compute the stationary endpoint's shadow and compare its exterior deformation with published Sagittarius A* measurements. The construction establishes local curvature regularity and marginal-sphere formation, without claiming a microscopic formation mechanism, perturbative stability, or geodesic completeness.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.13704",
  "author_total": 3,
  "authors": [
    {
      "name": "Emmanuele Battista"
    },
    {
      "name": "Ali Ovgun"
    },
    {
      "name": "Vitalii Vertogradov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/30n12dgc2engg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.13704",
  "fulltext_url": null,
  "id": "30n12dgc2engg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.13704",
  "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",
      "gr-qc"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7213290063",
  "pdf_url": "https://arxiv.org/pdf/2609.13704",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/30n12dgc2engg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.13704",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.13704"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Effective Matter Conversion in Gravitational Collapse and the Dynamical Formation of Regular Black Holes",
  "title_text": "Effective Matter Conversion in Gravitational Collapse and the Dynamical Formation of Regular Black Holes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/30n12dgc2engg",
  "venue": "arXiv",
  "versions": []
}