{
  "id": "1708.08586",
  "version": "v1",
  "published": "2017-08-29T04:14:56.000Z",
  "updated": "2017-08-29T04:14:56.000Z",
  "title": "Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare",
  "authors": [
    "Y. Li",
    "M. Kelly",
    "M. D. Ding",
    "J. Qiu",
    "X. S. Zhu",
    "W. Q. Gan"
  ],
  "comment": "ApJ accepted. Comments are welcome",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present observations of distinct UV spectral properties at different locations during an atypical X-shaped flare (SOL2014-11-09T15:32) observed by the Interface Region Imaging Spectrograph (IRIS). In this flare, four chromospheric ribbons appear and converge at an X-point where a separator is anchored. Above the X-point, two sets of non-coplanar coronal loops approach laterally and reconnect at the separator. The IRIS slit was located close to the X-point, cutting across some of the flare ribbons and loops. Near the location of the separator, the Si IV 1402.77 A line exhibits significantly broadened line wings extending to 200 km/s but an unshifted line core. These spectral features suggest the presence of bidirectional flows possibly related to the separator reconnection. While at the flare ribbons, the hot Fe XXI 1354.08 A line shows blueshifts and the cool Si IV 1402.77 A, C II 1335.71 A, and Mg II 2803.52 A lines show evident redshifts up to a velocity of 80 km/s, which are consistent with the scenario of chromospheric evaporation/condensation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-08-29T04:14:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-shaped solar flare",
      "magnetic reconnection",
      "spectroscopic observations",
      "chromospheric evaporation",
      "broadened line wings extending"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}