{
  "id": "1707.02478",
  "version": "v1",
  "published": "1970-01-01T00:00:00.000Z",
  "updated": "2017-07-08T18:47:19.000Z",
  "title": "Elongation of Flare Ribbons",
  "authors": [
    "Jiong Qiu",
    "Dana W. Longcope",
    "Paul A. Cassak",
    "Eric R. Priest"
  ],
  "journal": "The Astrophysical Journal, Volume 838, Issue 1, article id. 17, 17 pp. (2017)",
  "doi": "10.3847/1538-4357/aa6341",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present an analysis of the apparent elongation motion of flare ribbons along the polarity inversion line (PIL) as well as the shear of flare loops in several two-ribbon flares. Flare ribbons and loops spread along the PIL at a speed ranging from a few to a hundred km/s. The shear measured from conjugate foot-points is consistent with the measurement from flare loops, and both show the decrease of shear toward a potential field as a flare evolves and ribbons and loops spread along the PIL. Flares exhibiting fast bi-directional elongation appear to have a strong shear, which may indicate a large magnetic guide field relative to the reconnection field in the coronal current sheet. We discuss how the analysis of ribbon motion could help infer properties in the corona where reconnection takes place.",
  "revisions": [
    {
      "version": "v0",
      "updated": "1970-01-01T00:00:00.000Z",
      "title": "",
      "abstract": "",
      "comment": null,
      "journal": null,
      "doi": null,
      "authors": []
    },
    {
      "version": "v1",
      "updated": "2017-07-08T18:47:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "flare ribbons",
      "magnetic guide field relative",
      "loops spread",
      "flares exhibiting fast bi-directional elongation",
      "flare loops"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}