Open AccessDistribution of low-power solar flares by brightness rise time
Author(s) -
Александр Боровик,
Александр Боровик,
А. А. Zhdanov,
А. А. Zhdanov
Publication year - 2018
Publication title -
solar-terrestrial physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.11
H-Index - 2
ISSN - 2500-0535
DOI - 10.12737/stp-43201801
Subject(s) - solar flare , brightness , astrophysics , physics , flare , sunspot , maxima , astronomy , magnetic field , art , quantum mechanics , performance art , art history
For brightness classes this trend is less pronounced. We have found that flares with explosive phase and flares with one brilliant point have the shortest flash phases; two-ribbon flares and flares with several intensity maxima, the longest ones. We have separated 572 cases when the brightness rise time was more than 60 min; 80 % of such ultra-long flares have a shorter brightness decay time (main phase). We have established that low-power flares in terms of developmental features do not differ from large flares. Low-power solar flares, as well as large flares, can be followed by filament activation or disappearance, and can have an explosive phase and several intensity maxima. Two-ribbon flares, white-light flares, and flares covering sunspot umbra can also have low power.