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在2001~2003年Cluster飞船通过近地磁尾期间,共探测到14次重联事件,在这些事件中同时还观测到等离子体波活动.本文把14次事件分为三大类,其中:第I类包含了8次事件,它们是在等离子体片内先于重联事件观测到波活动,并且还同时观测到Hall磁场.经过分析判断,这类事件中观测到的波是右旋偏振的哨声波.第II类包含了2次事件,这类事件也观测到了Hall磁场和右旋偏振的哨声波.第Ⅲ类也包含了2次事件,这类事件只是普通的重联事件,没有观测到Hall磁场,但是波活动明显先于重联事件.在我们观测的14次事件中,比较强烈的哨声波和Hall磁场是一一对应的,因此哨声波可能主要是在Hall磁场的四极结构区激发的.
A total of 14 reconnection events were detected during the course of the spacecraft’s magnetic flux near the Earth’s surface from 2001 to 2003. In these events, plasma wave activities were also observed. In this paper, 14 events were divided into three categories: The class contains eight events, which are wave activity observed in the plasma slice prior to the reconnection event, and the Hall magnetic field is also observed at the same time.On the basis of analysis, the observed wave in this kind of event is a right-handed polarization Sound waves. Class II contains two events, such events also observed the Hall magnetic field and the right-handed polarized whistler waves. Category III also contains two events, such events are just ordinary reconnection events, not observed Hall magnetic field, but the wave activity obviously precedes the reconnection event.In the 14 events we observed, the stronger whistle wave and the Hall magnetic field are one-to-one correspondence, so the whistle wave may be mainly in the Hall magnetic field quadrupole structure area Excited.