{
  "id": "1904.11142",
  "version": "v1",
  "published": "2019-04-25T03:38:14.000Z",
  "updated": "2019-04-25T03:38:14.000Z",
  "title": "Oscillations Accompanying a He I 10830 Å Negative Flare in a Solar Facula II. Response of the Transition Region and Corona",
  "authors": [
    "Nikolai Kobanov",
    "Andrei Chelpanov"
  ],
  "comment": "12 pages, 4 figures",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We studied oscillations related to flare SOL2012-09-21T02:19 in the transition region and chromosphere based on Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and Solar Dynamics Observatory (SDO) data, as well as data from a ground-based observatory. We found that 2-minute oscillations triggered by the flare first appeared in the RHESSI channels then subsequently showed up in the SDO 171 {\\AA} and 304 {\\AA} channels and after that in the chromospheric He I 10830 {\\AA} line. The delay of the chromospheric signal compared to the RHESSI signal is 7 minutes, which indicates that the wave perturbation propagated from the corona to the chromosphere. We used the sharp increase in 3- and 5-minute oscillations during the flare in the lower atmosphere to trace the propagation of the oscillation trains to the transition region and corona. The results show that the 171 {\\AA} channel signals lagged behind the photospheric and chromospheric signals by 200 s on average. We suggest that we observed slow magnetoacoustic waves both in the case of 2-minute oscillations propagating downwards from the corona and in the case of 3- and 5-minute oscillations leaking to the corona from beneath.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-04-25T03:38:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "transition region",
      "solar facula",
      "negative flare",
      "oscillations accompanying",
      "ramaty high energy solar spectroscopic"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}