Dawnside particle injection caused by sudden enhancement of solar wind dynamic pressure

Dawnside particle injection caused by sudden enhancement of solar wind dynamic pressure
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太阳风动压突然增强引起的黎明粒子注入

DOI:
10.1016/j.jastp.2008.07.019
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发表时间:
2008-12
影响因子:
1.9
通讯作者:
Chen, Z. -T.
Chen, Z. -T.
中科院分区:
地球科学4区
文献类型:
--
作者:
Hu, H. -Q.;Huang, D. -H.;Han, D. -S.;Nose, M.;Yang, H. -G.;Chen, Z. -T.

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在这里,我们提出的第一个证据,粒子注入在黎明侧赤道平面所造成的突然增强的太阳风动压(SEPdyn)。观测结果表明,SEPdyn引起了两种效应:(1)在向阳面的瞬时粒子注入,(2)大约7min后在黎明面的粒子注入。前一种效应被认为是由于磁层突然压缩而使先前存在的粒子消失。我们认为,后者的效果是由于加速相对热的离子在黎明侧等离子体片由双极电场引起的SEPdyn。
Here we present the first evidence for particle injection in the dawn-side equatorial plane caused by a sudden enhancement of the solar wind dynamic pressure (SEPdyn). The observational results demonstrate that the SEPdyncaused two effects: (1) instantaneous particle energization in the dayside, and (2) particle injection in the dawn side at approximately 7min later. The former effect has been suggested to be energization of the preexisting particles by the sudden compression of the magnetosphere. We argue that the latter effect was due to acceleration of relatively hot ions in the dawn-side plasma sheet by a bipolar electric field caused by the SEPdyn.
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