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空间科学学报 2008
NumericalSimulationforthe16August1999EUVBrightenings, PP. 507-512 Keywords: Explosiveevents,Magneticreconnection,Coalescenceinstability,EUVbrightenings,Bi-directionalreconnectionjets Abstract: The16August1999EUVbrighteningsarenumericallysimulatedbyathird-orderupwindcompactscheme,basingontheTRACEobservation.Thepresentsimulationcangiveapossibleexplanationtoitsformationandevolution.ThenumericalresultsshowthattheinitialreconnectionjetsataroundX-pointareresponsiblefortheoccurrenceofEUVbrightening.ThestrongandsuperposedejectionscausedbythefirstandsecondcoalescenceofmagneticislandsarepossiblyrelatedtotheliftedmaterialwhichinitiallyappearedasabsorptionfeaturesandLaterEUV-emittingstructuresrespectively.Thebi-directionalreconnectionjetsmaycorrespondtotheliftedmaterialthateithercontinuedtomoveupwardalongtheapparentlyopenfieldlinesorfelldowntothesurface.
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