Dynamic Jovian Magnetosphere Responses to Enhanced Solar Wind Ram Pressure: Implications for Auroral Activities
Dynamic Jovian Magnetosphere Responses to Enhanced Solar Wind Ram Pressure: Implications for Auroral Activities
复制标题
动态木星磁层对增强太阳风冲压压力的响应：对极光活动的影响
DOI：
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复制
发表时间：
2022
影响因子：
5.2
通讯作者：
K. Sorathia
中科院分区：
文献类型：
--
作者：
Enhao Feng;Binzheng Zhang;Z. Yao;P. Delamere;Zhiqi Zheng;O. Brambles;S. Ye;K. Sorathia
木星极光的主要发射（ME）被认为与中磁层等离子体共转破坏相关的电流系统有关。根据主流的共转分解模型，当太阳风（SW）冲压压力增加时，木星ME的强度预计会降低，这与极光观测并不完全一致。除了场对准电流 (FAC) 之外，Alfvénic 功率 (AP) 在调节行星极光发射方面也发挥着重要作用。我们使用三维全局模拟来研究这些极光发射代理如何响应增强的西南冲压压力。我们发现，在 SW 压缩过程中，FAC 和 AP 都经历了上-下-上的趋势，这是以前的任何模拟都没有揭示的，但可能解释许多观察结果。结果表明，在西南压缩期间可以观察到不同的木星极光活动，包括变亮或变暗。
The main emission (ME) of the Jovian aurora is thought to be related to the current system associated with the breakdown of plasma corotation in the middle magnetosphere. According to the mainstream corotation breakdown model, the intensity of the Jovian ME is expected to decrease when the solar wind (SW) ram pressure increases, which is not fully consistent with auroral observations. In addition to the field‐aligned current (FAC), Alfvénic power (AP) play an important role in regulating planetary auroral emissions. We use three‐dimensional global simulations to investigate how these proxies of auroral emission respond to enhanced SW ram pressure. We found that during SW compression, both FAC and AP experience up‐down‐up trends, which is not revealed by any previous simulations, while could potentially explain many observations. The results suggest that different Jovian auroral activities including brightening or dimming can be observed during SW compression period.
DOI：
10.1029/2021ja029886
发表时间：
2021-08
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
R. Lysak;Yan Song;S. Elliott;W. Kurth;A. Sulaiman;D. Gershman
通讯作者：
R. Lysak;Yan Song;S. Elliott;W. Kurth;A. Sulaiman;D. Gershman
阿尔夫韦尼克椭圆形的动力学
DOI：
10.1016/j.jastp.2021.105616
发表时间：
2021
影响因子：
1.9
作者：
Keiling, Andreas
通讯作者：
Keiling, Andreas
影响因子：
5.2
作者：
Damiano, P. A.;Delamere, P. A.;Johnson, J. R.
通讯作者：
Johnson, J. R.