{
  "abstract": "We construct an exact static, magnetically charged solution of four-dimensional Einstein--Maxwell--dilaton theory that generalizes the centered Reissner--Nordström black hole in a Bertotti--Robinson magnetic background. Its pure-background limit is the magnetic EMD deformation of Bertotti--Robinson spacetime. Using the Emparan--Teo solution-generating technique, the charged construction reduces in canonical Weyl coordinates to replacing the Schwarzschild horizon rod by the Reissner--Nordström rod of half-length $σ=\\sqrt{m^2-e^2}$ and integrating the resulting nonlinear background--rod interaction. This yields a completely explicit solution for arbitrary dilaton coupling $α$, with the expected special limits and numerical verification of the full field equations. The horizon exhibits a coupled mechanical, electromagnetic and intrinsic response to the monopole--background interaction. The residual conical stress is tied to north--south magnetic polarization; increasing the background field produces the ordered reversal scales $B_{\\rm pole}<B_{\\rm crit}<B_{\\rm eq}$, independent of $α$ at fixed seed parameters $(m,e)$, while Gauss--Bonnet identifies the conical stress with the integrated distributional Gaussian-curvature contribution at the singular pole. Along the fixed-$(m,B,α,C)$ near-extremal path considered here, every $α>0$ gives vanishing horizon area and divergent curvature, whereas a correlated near-extremal strong-field limit yields a universal magnetic-reversal law.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.31408",
  "author_total": 1,
  "authors": [
    {
      "name": "Kenneth Hong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7xb9rtpfcvrvp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.31408",
  "fulltext_url": null,
  "id": "7xb9rtpfcvrvp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.31408",
  "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": "W7214590890",
  "pdf_url": "https://arxiv.org/pdf/2609.31408",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7xb9rtpfcvrvp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:52Z",
      "native_id": "2609.31408",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.31408"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Dilatonic Reissner--Nordström black holes in a Bertotti--Robinson magnetic background",
  "title_text": "Dilatonic Reissner--Nordström black holes in a Bertotti--Robinson magnetic background",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:52Z",
  "url": "https://research.draconitic.com/paper/7xb9rtpfcvrvp",
  "venue": "arXiv",
  "versions": []
}