{
  "id": "2410.21147",
  "version": "v1",
  "published": "2024-10-28T15:47:20.000Z",
  "updated": "2024-10-28T15:47:20.000Z",
  "title": "On the role of non-circular motions in MaNGA galaxies I: global properties",
  "authors": [
    "Carlos Lopez-Coba",
    "Lihwai Lin",
    "Justus Neumann",
    "Matthew A. Bershady"
  ],
  "comment": "13 pages, 10 figures. Accepted for publication in ApJ",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Non-circular (NC) motions represent the imprints of non-axisymmetric structures in galaxies, providing opportunities to study the physical properties of gas departing from circular rotation. In this work, we have conducted a systematic study of the non-circular motions in a sample of 1624 gas-rich disk galaxies from the MaNGA MPL-11. By using the H$\\alpha$ velocity as a tracer of the disk rotation, we find indications that the amplitude of the non-circular motions is related to the stellar mass, with the low mass and late-type galaxies the most affected. In our sample, we find ratios of circular to non-circular rotation ranging from 5% to 20%. By implementing harmonic models to include NC motions associated with spiral arms and stellar bars, we find that the rotational curves traced with H$\\alpha$ are barely affected by the NC induced by these structures. Consequently, in our sample, we do not find evidence that NC motions contribute to the scatter of the stellar Tully-Fisher relation. Our results suggest that non-circular motions might have a more localized effect in galaxies rather than a global one.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-10-28T15:47:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-circular motions",
      "manga galaxies",
      "global properties",
      "stellar tully-fisher relation",
      "gas-rich disk galaxies"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}