Emergence of Twisted Magnetic-Flux Bundles and Flare Activity in a Large Active Region, NOAA 4201
[摘要] Torevealwhatisthekeyagentforstrongflareactivity,westudiedtheevolutionofalargesunspotgroup,NOAA4201,anditsflareactivity.Weanalyzedhigh-resolutionHαimagesobtainedwiththeDomelessSolarTelescopeatHidaObservatory,andKittPeakfulldiskmagnetograms.WeexaminedthesunspotpropermotionsandevolutionarychangesofHαfinestructuresandmagneticfieldsinthisactiveregion,andconstructedaschematicmodelofemergingtwistedmagnetic-fluxbundles.Wealsofoundthattheoccurrenceofhighflareactivitywasrestrictedtotherapidlyemergingregionofthetwistedfluxbundle.Thisfactsuggeststhattheemergenceofatwistedemergingfluxbundleshouldbethekeytohighflareproductivityofthesunspotgroup.
[发布日期] [发布机构]
[效力级别] [学科分类] 天文学(综合)
[关键词] "Sun: activity";"Sun: flares";"Sun: magnetic fields";sunspots [时效性]
