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空间科学学报 2007
ICMEsLikelyFromtheSameActiveRegionObservedbyBothHelios1andIMP8, PP. 177-181 Keywords: ICME,Propagationandevolution Abstract: ThechanceofanInterplanetaryCoronalMassEjection(ICME)observedbywidely-separatedspacecraftisrare.However,suchaneventprovidesusagoodopportunitytostudythepropagationandevolutionofICMEsintheheliosphere.Onday72of1975,anICMEwasobservedbyHelios1at0.3AU,whileasimilarsolarwindstructurewasobservedbyIMP8atEarthonday70of1975.OnthebasisofcomparisonoftheplasmasignaturesandthetransittimefromHelios1toIMP8,wehypothesizetheobservedICMEsbybothspacecraftareresultedfromthesameactiveregiononthesolarsurface.Aone-dimensionalMHDmodelwasusedtotracktheICMEfromHelios1(0.3AU)toEarth.TheobservedplasmaprofilesandtimingareclosetothosepredictedbyourMHDmodelandthus,givethesupportstothemodel.
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