Energy Partition in Two M-class Circular-ribbon Flares
Zhang,Q. M.1,2; Cheng,J. X.3; Feng,L.1,4; Su,Y.1,4; Lu,L.1; Huang,Y.1,4; Li,D.1,2; Zhou,T. H.1; Chen,J. L.1,4
Source PublicationThe Astrophysical Journal
AbstractAbstract In this paper, we investigate the energy partition of two homologous M1.1 circular-ribbon flares (CRFs) in active region (AR) 12434. They were observed by SDO, GOES, and RHESSI on 2015 October 15 and 16, respectively. The peak thermal energy, nonthermal energy of flare-accelerated electrons, total radiative loss of hot plasma, and radiant energies in 1–8 ? and 1–70 ? of the flares are calculated. The two flares have similar energetics. The peak thermal energies are (1.94?±?0.13)?×?1030 erg. The nonthermal energies in flare-accelerated electrons are (3.9?±?0.7)?×?1030 erg. The radiative outputs of the flare loops in 1–70 ?, which are ~200 times greater than the outputs in 1–8 ?, account for ~62.5% of the peak thermal energies. The radiative losses of SXR-emitting plasma are one order of magnitude lower than the peak thermal energies. Therefore, the total heating requirements of flare loops including radiative loss are (2.1?±?0.1)?×?1030 erg, which could sufficiently be supplied by nonthermal electrons.
KeywordSun: flares Sun: magnetic fields Sun: UV radiation Sun: X-rays, gamma rays
WOS IDIOP:0004-637X-883-2-ab3a52
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory for Dark Matter and Space Science, Purple Mountain Observatory, CAS, Nanjing 210034, People’s Republic of China;
2.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
3.Key Laboratory of Planetary Sciences, Shanghai Astronomical Observatory, Shanghai 200030, People’s Republic of China
4.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
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Zhang,Q. M.,Cheng,J. X.,Feng,L.,et al. Energy Partition in Two M-class Circular-ribbon Flares[J]. The Astrophysical Journal,2019,883(2).
APA Zhang,Q. M..,Cheng,J. X..,Feng,L..,Su,Y..,Lu,L..,...&Chen,J. L..(2019).Energy Partition in Two M-class Circular-ribbon Flares.The Astrophysical Journal,883(2).
MLA Zhang,Q. M.,et al."Energy Partition in Two M-class Circular-ribbon Flares".The Astrophysical Journal 883.2(2019).
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