Magnetopause reconnection and indents induced by foreshock turbulence
| Autor: | Shan Wang, Yuri Omelchenko, Li-Jen Chen, Jonathan Ng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
FOS: Physical sciences 010502 geochemistry & geophysics 01 natural sciences ion escape Solar Wind/Magnetosphere Interactions Physics::Geophysics Magnetopause and Boundary Layers Magnetosheath Physics - Space Physics Research Letter Astrophysics::Solar and Stellar Astrophysics Magnetospheric Physics Ionosphere collisionless shocks Interplanetary magnetic field magnetopause reconnection Planetary Sciences: Solid Surface Planets Planetary Sciences: Fluid Planets foreshock turbulence Plasma Waves and Instabilities 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Physics Turbulence Plasma Geophysics Planetary Magnetospheres magnetosheath Space Physics (physics.space-ph) Physics - Plasma Physics Foreshock Plasma Physics (physics.plasm-ph) Interplanetary Physics Shear (sheet metal) Solar wind Magnetospheres Physics::Space Physics General Earth and Planetary Sciences Magnetopause Planetary Sciences: Comets and Small Bodies Astrophysics::Earth and Planetary Astrophysics Planetary Bow Shocks Space Sciences Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Geophysical Research Letters |
| Popis: | 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. Key Points Foreshock turbulence can reach the magnetopause under a northward quasi‐radial interplanetary magnetic field with zero dawn‐dusk componentThe turbulence can create large magnetic shear angles across the magnetopause, leading to local bursty reconnectionBombardments of the turbulence cause Earth‐sized magnetopause indents under constant interplanetary magnetic field and solar wind |
| Databáze: | OpenAIRE |
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