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SUMMARY:Picoflares in the Quiet Solar Corona
DTSTART;VALUE=DATE-TIME:20230510T133500Z
DTEND;VALUE=DATE-TIME:20230510T135000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115655Z
UID:indico-contribution-325@meetings.aip.de
DESCRIPTION:Speakers: Olena Podladchikova (The Leibniz Institute for Astro
 physics Potsdam (AIP))\nOn May 30\, 2020\, the Solar Orbiter High-Resoluti
 on Imager operating in  174 A being for the first time approximately at a 
 half AU to the Sun\, registered a large number of short\, small-scale heat
 ing events\, often called campfires\, with rich morphology and smaller spa
 ce-time characteristics than nanoflares. We estimate the thermal energy of
  the heating events from increases in the emission measure and temperature
  using methods assessing thermal energy in flares. We compare these with t
 he characteristics of X-ray flares\, in particular\, those recorded by the
  X-ray spectrometer/telescope onboard Solar Orbiter.  We found campfires e
 mit thermal energy in picoflares range. The additional previously unaccoun
 ted energy input of is about 1% to the total required to sustain quiet sol
 ar corona power. The observed frequency distribution would have to continu
 e to the femtoflares range to fulfill the observed heating requirement. We
  explain the existence of solar flares below the expected nanoflare thresh
 old as follows. They originate in small coronal loops of 200-5000 km\, sma
 ller than considered by Parker. Some picoflares show only a partial energy
  release along a single loop.\n\nhttps://meetings.aip.de/event/24/contribu
 tions/325/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/325/
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