{
  "abstract": "Aims: This study aims to place constraints on the spin of Sgr A* from recent flare observations. It models the flare kinematics in the vicinity of a supermassive black hole, evaluates their dependence on black hole spin, and assesses the correlation between the spin of the black hole and the astrometric observations in the Galactic center. Methods: Our study extends the work of Antonopoulou et al. 2025 to a range of black hole spins. A prominent flux eruption is identified in the simulation, and the evolution of the active region on the equatorial plane is tracked during the event. The flare model consists of a spherical hot spot ejected along the flux tube with a relativistic velocity. Results: In MAD simulations, the flux tube wraps around the jet funnel in the opposite direction to the black hole's spin. This dependence is imprinted on the flare trajectory and provides a strong correlation between the spin of the black and the flare kinematics. This analysis favors Kerr black holes, with a preference towards larger spin magnitude. Although prograde simulations show a consistent clockwise motion in the sky regardless of disk rotation, retrograde models require a clockwise accretion disk to account for the observations of July 22, 2018. Conclusions: A maximally rotating Kerr black hole is the most promising candidate for reproducing the observed flare trajectory in the vicinity of Sgr A*, illustrating a pass faction surpassing $90\\%$ among the investigated flare models. In particular, determining spin orientation within this model is linked to the rotation of the accretion disk. Assuming a counterclockwise accretion disk, a prograde black hole with $a\\geq1/2$ is able to reproduce the observed flare kinematics in the Galactic center. Conversely, assuming a clockwise rotation for the disk, the observations support both prograde and retrograde Kerr black holes with a large spin.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.30095",
  "author_total": 4,
  "authors": [
    {
      "name": "Eleni Antonopoulou"
    },
    {
      "name": "Antonios Nathanail"
    },
    {
      "name": "Yosuke Mizuno"
    },
    {
      "name": "Foivos Zanias"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/etcm1xdk1nz6a.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.30095",
  "fulltext_url": null,
  "id": "etcm1xdk1nz6a",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.30095",
  "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",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7223238827",
  "pdf_url": "https://arxiv.org/pdf/2610.30095",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/etcm1xdk1nz6a.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:19Z",
      "native_id": "2610.30095",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.30095"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Modeling MAD Sgr A* flares and their dependence on spin",
  "title_text": "Modeling MAD Sgr A* flares and their dependence on spin",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:19Z",
  "url": "https://research.draconitic.com/paper/etcm1xdk1nz6a",
  "venue": "arXiv",
  "versions": []
}