{
  "abstract": "We present FUGUE, a new GPU-accelerated code for general relativistic magnetohydrodynamics (GRMHD). The code supports an optional quasi-stationary update of the Kerr black hole mass and spin, as well as weak-field multipole self-gravity computed with a spherical harmonic Poisson solver. The calculations using high-order multipoles in the Poisson solver are expensive, so the self-gravity solver is well suited for GPU acceleration. The code uses shock-capturing methods and a second-order Runge--Kutta (RK2) scheme for time integration. We validate the code with hydrodynamic, magnetohydrodynamic, general relativistic, and convergence tests for the self-gravity module. We present an application of the code to a simulation of a self-gravitating, Toomre-unstable, magnetized accretion disk with a mass of 1,M-Sun around a Kerr black hole. In our demonstration model, gravitational instabilities are associated with changes in the mass accretion rate and the Blandford--Znajek luminosity, and may contribute to gamma-ray burst variability.The performance of the code is equivalent to or exceeds that of the current state-of-the-art GRMHD codes, achieving more than 470 million zone-cycles per second on a single NVIDIA GH200 GPU with linear reconstruction.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20869",
  "author_total": 2,
  "authors": [
    {
      "name": "Piotr Plonka"
    },
    {
      "name": "Agnieszka Janiuk"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a5n5cq7n45ahp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20869",
  "fulltext_url": null,
  "id": "a5n5cq7n45ahp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20869",
  "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"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7222620143",
  "pdf_url": "https://arxiv.org/pdf/2610.20869",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a5n5cq7n45ahp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.20869",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20869"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "FUGUE: A New GPU-accelerated General Relativistic Magnetohydrodynamics Code with Weak-Field Multipole Self-Gravity and Quasi-Stationary Kerr Black Hole Evolution",
  "title_text": "FUGUE: A New GPU-accelerated General Relativistic Magnetohydrodynamics Code with Weak-Field Multipole Self-Gravity and Quasi-Stationary Kerr Black Hole Evolution",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/a5n5cq7n45ahp",
  "venue": "arXiv",
  "versions": []
}