Variation in the Flaring Potential of Different Sunspot Groups During Different Phases of Solar Cycles 23 and 24  

作　　者：Abha Singh Anurag Chaudhari Gyaneshwar Sharma A.K.Singh 

机构地区：[1]Department of Physics,T.D.P.G.College Jaunpur-222002,India [2]Department of Physics,Banaras Hindu University,Varanasi-221005,India

出　　处：《Research in Astronomy and Astrophysics》2024年第2期144-153,共10页天文和天体物理学研究（英文版）

基　　金：partially supported by the Institute of Eminence(Io E)Program(Scheme No:6031)of BHU,Varanasi。

摘　　要：In this present study,we have analyzed different types of X-ray solar flares(C,M,and X classes)coming out from different classes of sunspot groups(SSGs).The data which we have taken under this study cover the duration of 24 yr from 1996 to 2019.During this,we observed a total of 15015 flares(8417 in SC-23 and 6598 in SC-24)emitted from a total of 33780 active regions(21746 in SC-23 and 12034 in SC-24)with sunspot only.We defined the flaring potential or flare-production potential as the ratio of the total number of flares produced from a particular type of SSG to the total number of the same-class SSGs observed on the solar surface.Here we studied yearly changes in the flaring potential of different McIntosh class groups of sunspots in different phases of SC-23 and 24.In addition,we investigated yearly variations in the potential of producing flares by different SSGs(A,B,C,D,E,F,and H)during different phases(ascending,maximum,descending,and minimum)of SC-23 and 24.These are our findings:(1)D,E,and F SSGs have the potential of producing flares≥8 times greater than A,B,C and H SSGs;(2)The larger and more complex D,E,and F SSGs produced nearly 80%of flares in SC-23 and 24;(3)The A,B,C and H SSGs,which are smaller and simpler,produced only 20%of flares in SC-23 and 24;(4)The biggest and most complex SSGs of F-class have flaring potential 1.996 and 3.443 per SSG in SC-23 and 24,respectively.(5)The potential for producing flares in each SSG is higher in SC-24 than in SC-23,although SC-24 is a weaker cycle than SC-23.(6)The alterations in the number of flares(C+M+X)show different time profiles than the alterations in sunspot numbers during SC-23 and 24,with several peaks.(7)The SSGs of C,D,E,and H-class have the highest flaring potential in the descending phase of both SC-23 and 24.(8)F-class SSGs have the highest flaring potential in the descending phase of SC-23 but also in the maximum phase of SC-24.

关 键 词：(Sun:)sunspots-Sun flares-Sun activity-Sun magnetic fields-Sun filaments-prominences 

分 类 号：P182.52[天文地球—天文学]