Magnetopause Reconnection and Indents Induced by Foreshock Turbulence

被引：21

作者：

Chen, Li-Jen ^{[1
]}

Ng, Jonathan ^{[1
,2
]}

Omelchenko, Yuri ^{[3
,4
]}

Wang, Shan ^{[1
,2
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Maryland, College Pk, MD 20742 USA

[3] Trinum Res Inc, San Diego, CA USA

[4] Space Sci Inst, Boulder, CO USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 11期

关键词：

collisionless shocks; foreshock turbulence; ion escape; magnetopause reconnection; magnetosheath; planetary magnetospheres; EARTHS BOW SHOCK; UPSTREAM; NORTHWARD; MAGNETOSHEATH; DIFFUSION; MODEL; IONS; FLOW;

D O I：

10.1029/2021GL093029

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Based on global hybrid simulation results, we predict that foreshock turbulence can reach the magnetopause and lead to reconnection as well as Earth-sized indents. Both the interplanetary magnetic field (IMF) and solar wind are constant in our simulation, and hence, all dynamics are generated by foreshock instabilities. The IMF in the simulation is mostly Sun-Earth aligned with a weak northward and zero dawn-dusk component, such that subsolar magnetopause reconnection is not expected without foreshock turbulence modifying the magnetosheath fields. We show a reconnection example to illustrate that the turbulence can create large magnetic shear angles across the magnetopause to induce local bursty reconnection. Magnetopause reconnection and indents developed from the impact of foreshock turbulence can potentially contribute to dayside loss of planetary plasmas.

引用

页数：7

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