{
  "id": "2412.08359",
  "version": "v1",
  "published": "2024-12-11T13:06:24.000Z",
  "updated": "2024-12-11T13:06:24.000Z",
  "title": "Analytical ray-tracing of synchrotron emission around accreting black holes",
  "authors": [
    "Alexandra Veledina",
    "Matthieu Pélissier"
  ],
  "comment": "19 pages, 15 figures, submitted to A&A",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Polarimetric images of accreting black holes encode important information about laws of strong gravity and relativistic motions of matter. Recent advancements in instrumentation enabled such studies in two objects: supermassive black holes M87* and Sagittarius A*. Light coming from these sources is produced by synchrotron mechanism whose polarization is directly linked to magnetic field lines, and propagates towards the observer in a curved spacetime. We study the distortions of the gas image by the analytical ray-tracing technique for polarized light artpol, that is adapted for the case of synchrotron emission. We derive analytical expressions for fast conversion of intensity/flux, polarization degree and polarization angle from the local to observer's coordinates. We put emphasis on the non-zero matter elevation above the equatorial plane and non-circular matter motions. Applications of the developed formalism include static polarimetric imaging of the black hole vicinity and dynamic polarimetric signatures of matter close to the compact object.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-12-11T13:06:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "synchrotron emission",
      "analytical ray-tracing",
      "black holes encode important information",
      "accreting black holes encode important",
      "dynamic polarimetric signatures"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}