资源描述：
《Pulsations of the auroral kilometric radiation极光千里辐射脉动》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、JOURNALOFGEOPHYSICALRESEARCH,VOL.111,A03209,doi:10.1029/2005JA011302,2006Pulsationsoftheauroralkilometricradiation1211J.Hanasz,H.deFeraudy,R.Schreiber,andM.PanchenkoReceived7July2005;revised15October2005;accepted15December2005;published10March2006.[1]RadiospectrogramsderivedfromInterball-2/Polra
2、dsatellitedatahavebeenfoundtoincludethesignatureofaspecifictypeofauroralkilometricradiation(AKR),characterizedby3to10periodicemissionintensifications.TheseoccuratfrequenciesofseveralmHz,whicharewellmatchedwiththefrequencyrangeofPc5pulsations.From61eventsofpulsatingAKRobservedbyInterball-2,39samp
3、leswerefoundtopulsateatnearlythesamefrequencyasfieldlineresonances(FLRs)recordedsimultaneouslywithIMAGE,theground-basedmagnetometerarray.ThemainconclusiondrawnfromthisstudyisthatFLRsareabletodriveAKRpulsations.ThisisconfirmedbytheobservedcorrelationbetweentheAKRandFLRpulsationfrequencies,togethe
4、rwithanalysisoftheAKRsourcelocations.ThelongitudinalextentofFLRstructures,spanningseveralhours,isinferredfromthelargedistancesseparatingthepulsatingAKRsourcefootprintsfromthegroundmagnetometerobservations.ThediscussionshowsthatFLRsareplausiblesitesforpulsatingAKRsources,sincetheirnonlinearevolut
5、ioncanleadto(1)cavityformationbytheparallelelectricfieldsofstandinginertialAlfve´nwaves,and(2)theeffectivetransferofelectromagneticenergyfromthesewavesintotheaccelerationofdownflowingelectrons,toenergiesofuptoseveralkeVduringeachhalfofapulsationcycle.Citation:Hanasz,J.,H.deFeraudy,R.Schrieber,an
6、dM.Panchenko(2006),Pulsationsoftheauroralkilometricradiation,J.Geophys.Res.,111,A03209,doi:10.1029/2005JA011302.1.IntroductiontypesofAKRemissionwhichcouldalsoberelatedtoauroralmagnetosphericprocesses.[2]Auroralkilometricradiation(AKR)isstronglyvari-[3]Inthispaperwedescribeaparticularmanifestatio
7、nofableradioemissiongeneratedatfrequenciesrangingfromAKR,referredtoaspulsatingauroralkilometricradiation20to1000kHz,arisingfromsourcesextendedalongtheandprovideevidenceofitsrelationshiptothemagneto-geomagneticfieldlinesofthe
