{
  "abstract": "Polarized black-hole images carry information about both the magnetized plasma and the curved spacetime through which the radiation propagates. We present KPolaris, an open-source GPU-accelerated general-relativistic polarized radiative-transfer code built on the Kokkos framework. It supports analytic plasma models and GRMHD simulation data, with both fast-light and slow-light radiative transfer. The code also provides diagnostics that connect image structure to the emitting plasma and to propagation effects along the rays. These include emissivity-weighted plasma maps, emission contributions from selected regions, selected-ray histories, and sensitivities of the Stokes parameters to plasma parameters. Numerical convergence tests and comparisons with an independent radiative-transfer code assess the accuracy of the calculations. GPU acceleration reduces the computational cost of image generation, facilitating multi-frequency and time-dependent studies of polarized black-hole images.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26298",
  "author_total": 2,
  "authors": [
    {
      "name": "Zelin Zhang"
    },
    {
      "name": "Bin Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dh47atb1s7c9m.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26298",
  "fulltext_url": null,
  "id": "dh47atb1s7c9m",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26298",
  "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"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7214067082",
  "pdf_url": "https://arxiv.org/pdf/2609.26298",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dh47atb1s7c9m.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.26298",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26298"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "KPolaris: GPU-accelerated Polarized Radiative Transfer in General Relativity",
  "title_text": "KPolaris: GPU-accelerated Polarized Radiative Transfer in General Relativity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/dh47atb1s7c9m",
  "venue": "arXiv",
  "versions": []
}