Decay Timescales of Chromospheric Condensations in Solar Flare Footpoints

Details

• Journal Title:
  The Astrophysical Journal
• Personal Author:
  Butler, Elizabeth C. ; Kowalski, Adam F.
• NOAA Program & Office:
  NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)
• Description:
  Chromospheric condensations (CCs) are a prominent feature of flare footpoint heating in the solar flare standard model, yet their timescales and velocities are not well understood. Fisher derived several important analytical relationships, which have rarely been examined with modern spectral observations. The Interface Region Imaging Spectrograph (IRIS) provides a wealth of flare data with a high enough cadence to sufficiently capture CC evolution. We analyzed Doppler shifts in Mg ii 2791 and Fe ii 2814 from a sample of flare footpoint pixels observed by IRIS to compare with Fisher's analytics and recent flare models.
• Source:
  The Astrophysical Journal, 970(1), 33
• DOI:
  https://doi.org/10.3847/1538-4357/ad3dfb
• ISSN:
  0004-637X ; 1538-4357
• Format:
  pdf
• Publisher:
  American Astronomical Society
• Document Type:
  Journal Article
• License:
  https://creativecommons.org/licenses/by/4.0/
• Rights Information:
  CC BY
• Compliance:
  Library
• Main Document Checksum:
  urn:sha-512:7ed0381cbe659fd00b6e07257eca0748bdbe6b020ca7364b187c4dc2eb57e03a4562d608e14be67d57970d5a96f0f3dd881d52df687c7070ee9f5e75698a47aa
• Download URL:
  https://repository.library.noaa.gov/view/noaa/69696/noaa_69696_DS1.pdf
• File Type:
  [PDF - 1.27 MB ]