【摘 要】
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How the solar wind is accelerated to its supersonic terminal speed is intimatelyrelated to how it is heated.Mechanisms based on ion-cyclotron resonance have been successful inexplaining a large number
【机 构】
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Shandong University at Weihai, China University o
【出 处】
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第十届海峡两岸空间/太空科学研讨会
论文部分内容阅读
How the solar wind is accelerated to its supersonic terminal speed is intimatelyrelated to how it is heated.Mechanisms based on ion-cyclotron resonance have been successful inexplaining a large number of observations,those concerning the significant ion temperatureanisotropy above coronal holes in particular.However,they suffer from the inconsistency withturbulence theory which says that the turbulent cascade in a low-beta medium like the solar coronashould proceed in the perpendicular rather than the parallel direction,meaning that there is littleenergy in the ion gyro-frequency range for ions to absorb via ion-cyclotron resonance.Recently amechanism based on the interaction between solar wind particles and the kinetic Alfven wavesgenerated by the perpendicular cascade has been proposed,where electron and parallel protonheating derives from Landau resonance,whereas the perpendicular proton energy addition is viastochastic heating (Chandran et al.2011).
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