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AlfvénWavesintheSolarWind

, PP. 353-373

Keywords: Alfvé,nwave,Solarwind,RotationalDiscontinuity(RD),TangentialDiscontinuity(TD),Solarwindstructures

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Abstract:

Alfvénwavesarefoundtobeubiquitousinthesolarwind.RecentprogressinobservationalstudiesofthewavesisreviewedtoformulateamicroscopicpicturefortheAlfvénicfluctuations.Themainaspectsoftheobservationalpropertiesofthesewaves,includingthewaveintervals,propagation,evolution,originandgeneration,arepresented.ThenAlfvénwaveheatingandaccelerationofthesolarwindplasmaarebrieflyintroduced.Therelationofthewavestorotationalandtangentialdiscontinuities,magneticdecreases,andotherrelativelylarge-scalestructuressuchasfluxtubes/ropes,magneticcloudsandinterplanetarycoronalmassejectionsinthesolarwindisparticularlyinvestigated.Finally,someremainingopenquestionsarealsoindicatedduetotheirfundamentalimportanceofunderstandingofthephysicalnatureofAlfvénwavesandtheroleofthewavesinheatingandacceleratingthesolarwind.

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