On the Transmission of Turbulent Structures across the Earth’s Bow Shock
On the Transmission of Turbulent Structures across the Earth’s Bow Shock
复制标题
关于地球弓激波中湍流结构的传递
DOI：
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复制
发表时间：
2022
影响因子：
4.9
通讯作者：
F. Valentini
中科院分区：
文献类型：
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作者：
D. Trotta;F. Pecora;A. Settino;D. Perrone;H. Hietala;T. Horbury;W. Matthaeus;D. Burgess;S. Servidio;F. Valentini
无碰撞激波和等离子体湍流是广泛的天体物理系统的关键组成部分。激波湍流相互作用，特别是传输的充分发展的湍流在准垂直地球的弓激波，在这里解决使用航天器的观测和当地的数值模拟相结合。风（上游）和磁层多尺度（下游）航天器之间的对齐用于研究整个冲击的湍流结构的传输，揭示了其下游的磁螺旋度含量的增加。当地的动力学模拟，其中湍流结构的动力学是通过其传输跨垂直冲击，证实了这种情况下，揭示了所观察到的磁螺旋度增加与压缩的湍流结构在冲击波前。
Collisionless shocks and plasma turbulence are crucial ingredients for a broad range of astrophysical systems. The shock–turbulence interaction, and in particular the transmission of fully developed turbulence across the quasi-perpendicular Earth’s bow shock, is here addressed using a combination of spacecraft observations and local numerical simulations. An alignment between the Wind (upstream) and Magnetospheric Multiscale (downstream) spacecraft is used to study the transmission of turbulent structures across the shock, revealing an increase of their magnetic helicity content in its downstream. Local kinetic simulations, in which the dynamics of turbulent structures are followed through their transmission across a perpendicular shock, confirm this scenario, revealing that the observed magnetic helicity increase is associated with the compression of turbulent structures at the shock front.
DOI：
10.3847/1538-4357/ac2e06
发表时间：
2021-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Nakanotani;G. Zank;L.-L. Zhao-L.
通讯作者：
M. Nakanotani;G. Zank;L.-L. Zhao-L.
DOI：
10.3847/1538-4357/ac4781
发表时间：
2022-02
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Nakanotani;G. Zank;L.-L. Zhao-L.
通讯作者：
M. Nakanotani;G. Zank;L.-L. Zhao-L.