{
  "id": "2309.02398",
  "version": "v1",
  "published": "2023-09-05T17:13:43.000Z",
  "updated": "2023-09-05T17:13:43.000Z",
  "title": "Exploring magnetic coupling of solar atmosphere through frequency modulations of 3-min slow magnetoacoustic waves",
  "authors": [
    "Ananya Rawat",
    "Girjesh Gupta"
  ],
  "comment": "This is a slight extended version of the paper accepted for publication in Bulletin of Li\\`ege Royal Society of Sciences (proceedings of the third BINA workshop). arXiv admin note: text overlap with arXiv:2308.03490",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Coronal fan loops rooted in sunspot umbra show outward propagating waves with subsonic phase speed and period around 3-min. However, their source region in the lower atmosphere is still ambiguous. We performed multi-wavelength observations of a clean fan loop system rooted in sunspot observed by Interface Region Imaging Spectrograph (IRIS) and Solar Dynamics Observatory (SDO). We utilised less explored property of frequency modulation of these 3-min waves from the photosphere to corona, and found them to be periodic with the ranges in 14-20 min, and 24-35 min. Based on our findings, we interpret that 3-min slow waves observed in the coronal fan loops are driven by 3-min oscillations observed at the photospheric footpoints of these fan loops in the umbral region. We also explored any connection between 3-min and 5-min oscillations observed at the photosphere, and found them to be poorly understood. Results provide clear evidence of magnetic coupling of the solar umbral atmosphere through propagation of 3-min waves along the fan loops at different atmospheric heights.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-09-05T17:13:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "slow magnetoacoustic waves",
      "frequency modulation",
      "exploring magnetic coupling",
      "solar atmosphere",
      "coronal fan loops"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}