{
  "abstract": "We study a quantum-corrected version of the Oppenheimer--Snyder (OS) spacetime in which classical collapse is modified by a single effective-parameter \\(α\\), representing small-quantum-gravitational effects in a phenomenologically rescaled-form. Although the correction enters through a term proportional to \\(αM^2/r^4\\), it produces noticeable changes in the strong-field region while leaving weak-field physics almost unchanged. One of the main results is the appearance of a minimum-mass for horizon-formation, \\(M_{\\min} \\sim(0.5-1.2)\\,M_\\odot\\) for the effective-parameter \\(α\\approx0.22\\). We emphasize that this \\(M_{\\min}\\) is expressed in terms of the effective-parameter \\(α\\); in terms of the bare loop-quantum-gravity (LQG) parameter, \\(M_{\\min}\\sim M_{\\text{Pl}}\\sim10^{-5}\\)~g, consistent with the theoretical-expectation. Orbital properties are also slightly modified, with the innermost-stable-circular-orbit (ISCO) shifting to \\(r_{\\rm ISCO}=6M-α/(12M)\\), giving corrections-of-order \\( \\sim 10^{-4} \\) for stellar-black-holes and \\(\\sim 10^{-10}\\) for Sgr A$^\\ast$. In the same region, radial epicyclic frequencies change by about \\(5\\%-10\\%\\) near \\(r\\sim5M\\), while vertical modes are less affected, leading to small but structured shifts in quasi-periodic oscillation (QPO) behavior. Using four X-ray binaries (GRS 1915+105, XTE J1550-564, XTE J1859+226, GRO J1655-40), we find a consistent range \\(α=0.22\\pm0.10\\), with masses between \\(5.4-12.4\\,M_\\odot\\) and emission radii \\(r/M \\sim 5.5 - 8.6\\). The observed QPO frequencies, lying in the range \\(100-450\\) Hz, are well reproduced within this framework. Weak-field tests such as S2 and Mercury still allow \\(f_{\\rm sp}=1.10 \\pm 0.19\\), leaving room for these small strong-gravity corrections.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.16018",
  "author_total": 7,
  "authors": [
    {
      "name": "A. Errehymy"
    },
    {
      "name": "Y. Khedif"
    },
    {
      "name": "M. Daoud"
    },
    {
      "name": "B. Turimov"
    },
    {
      "name": "S. Usanov"
    },
    {
      "name": "F. Turaev"
    },
    {
      "name": "Z. Yasakov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d8qermsf0g766.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.16018",
  "fulltext_url": null,
  "id": "d8qermsf0g766",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.16018",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.16018",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d8qermsf0g766.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2609.16018",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.16018"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Joint Constraints on Quantum Oppenheimer--Snyder Black Holes from High-Frequency Quasi-Periodic Oscillations in X-ray Binary Systems and the S2 Star Orbit",
  "title_text": "Joint Constraints on Quantum Oppenheimer--Snyder Black Holes from High-Frequency Quasi-Periodic Oscillations in X-ray Binary Systems and the S2 Star Orbit",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/d8qermsf0g766",
  "venue": "arXiv",
  "versions": []
}