@article{Liu:2020:10.1029/2019ja027709,
author = {Liu, TZ and Hietala, H and Angelopoulos, V and Vainio, R and Omelchenko, Y},
doi = {10.1029/2019ja027709},
journal = {Journal of Geophysical Research: Space Physics},
pages = {1--13},
title = {Electron acceleration by magnetosheath jetdriven bow waves},
url = {http://dx.doi.org/10.1029/2019ja027709},
volume = {125},
year = {2020}
}

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TY  - JOUR
AB  - Magnetosheath jets are localized fast flows with enhanced dynamic pressure. When they supermagnetosonically compress the ambient magnetosheath plasma, a bow wave or shock can form ahead of them. Such a bow wave was recently observed to accelerate ions and possibly electrons. The ion acceleration process was previously analyzed, but the electron acceleration process remains largely unexplored. Here we use multipoint observations by Time History of Events and Macroscale during Substorms from three events to determine whether and how magnetosheath jetdriven bow waves can accelerate electrons. We show that when suprathermal electrons in the ambient magnetosheath convect towards a bow wave, some electrons are shockdrift accelerated and reflected towards the ambient magnetosheath and others continue moving downstream of the bow wave resulting in bidirectional motion. Our study indicates that magnetosheath jetdriven bow waves can result in additional energization of suprathermal electrons in the magnetosheath. It implies that magnetosheath jets can increase the efficiency of electron acceleration at planetary bow shocks or other similar astrophysical environments.
AU  - Liu,TZ
AU  - Hietala,H
AU  - Angelopoulos,V
AU  - Vainio,R
AU  - Omelchenko,Y
DO  - 10.1029/2019ja027709
EP  - 13
PY  - 2020///
SN  - 2169-9380
SP  - 1
TI  - Electron acceleration by magnetosheath jetdriven bow waves
T2  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1029/2019ja027709
UR  - https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027709
UR  - http://hdl.handle.net/10044/1/80246
VL  - 125
ER  - 

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