Magnetopause Reconnection and Indents Induced by Foreshock Turbulence

Chen, Li‐Jen; Ng, Jonathan; Omelchenko, Yuri; Wang, Shan

doi:10.1029/2021GL093029

Title: Magnetopause Reconnection and Indents Induced by Foreshock Turbulence

Journal Article · Mon May 31 00:00:00 UTC 2021 · Geophysical Research Letters

DOI: https://doi.org/10.1029/2021GL093029 · OSTI ID:1785390

^[1]; Ng, Jonathan ^[2];

^[3];

^[2]

NASA Goddard Space Flight Center Greenbelt MD USA
NASA Goddard Space Flight Center Greenbelt MD USA, University of Maryland College Park MD USA
Trinum Research, Inc. San Diego CA USA, Space Science Institute Boulder CO USA

Abstract 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.

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Research Organization:: Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: SC0016278; SC0020058

OSTI ID:: 1785390

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 11 Vol. 48; ISSN 0094-8276

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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58 GEOSCIENCES
collisionless shocks
foreshock turbulence
ion escape
magnetopause reconnection
magnetosheath
planetary magnetospheres

Title: Magnetopause Reconnection and Indents Induced by Foreshock Turbulence

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