Initiation and chromospheric effects of a M1.0 class solar flare from high-resolution multi-wavelength observations

V. M. Sadykov, A. G. Kosovichev, I. N. Sharykin, I. V. Zimovets, S. Vargas Dominguez

Research output: Contribution to journalArticlepeer-review


Initiation and development of a M1.0 class flare of June 12, 2014, was observed by space and ground-based telescopes, including EUV and X-ray imaging spectroscopy by IRIS and RHESSI, and high-resolution optical imaging by 1.6m New Solar Telescope (NST). Analyzing the NST data, we found small-scale loop-like structures in the region of the magnetic field Polarity Inversion Line (PIL), the emergence and interaction of which caused photospheric brightenings temporarily coinciding with hard X-ray impulses. Detailed studies of the PIL region reveal signatures of photospheric plasma downflows and dissipation of electric currents. The reconstructed magnetic field topology shows a bundle of lines connecting the PIL region with the flare ribbons which were places of chromospheric evaporation observed by IRIS. The observations suggest a scenario with the primary energy release processes located in the low atmospheric layers of the PIL, energizing the overlying large-scale magnetic structure and causing "gentle" chromospheric evaporation.

Original languageEnglish (US)
Pages (from-to)103-108
Number of pages6
JournalProceedings of the International Astronomical Union
StatePublished - 2016

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


  • Sun: Chromosphere
  • Sun: Flares
  • Sun: Magnetic fields
  • Sun: Photosphere
  • Sun: Transition region


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