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SUMMARY:Differential Rotation of the Solar Chromosphere using multidecadal
  Ca K spectroheliograms
DTSTART;VALUE=DATE-TIME:20230511T123000Z
DTEND;VALUE=DATE-TIME:20230511T124500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115652Z
UID:indico-contribution-343@meetings.aip.de
DESCRIPTION:Speakers: Dibya Kirti Mishra (ARIES\, India)\nDifferential rot
 ation is a key aspect of the solar dynamo model and is well-established in
  the Sun's interior and photosphere. However\, our understanding of the ch
 romosphere and upper atmosphere's differential rotation is limited and has
  yielded contradictory results in previous studies. To address this\, we u
 tilized a century-long dataset of Ca II K images (1907-2007) from the Koda
 ikanal Solar Observatory (KoSO) to investigate the chromosphere's rotation
  profile during different solar cycles. By employing the image correlation
  analysis on sets of consecutive day images\, we found that the chromosphe
 re rotates 1.52% faster than the photosphere but with less differential ro
 tation compared to the photosphere values. To validate our method and resu
 lts\, we applied the same technique to MDI white light data and other Ca I
 I K data sources (Meudon and PSPT/Rome) and obtained consistent results. M
 oreover\, we examined the solar cycle dependence of differential rotation 
 parameters and investigated the north-south asymmetry of the solar rotatio
 n profile.\n\nhttps://meetings.aip.de/event/24/contributions/343/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/343/
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