TY - JOUR
T1 - Lower Hybrid Drift Waves During Guide Field Reconnection
AU - Yoo, Jongsoo
AU - Ji, Jeong Young
AU - Ambat, M. V.
AU - Wang, Shan
AU - Ji, Hantao
AU - Lo, Jenson
AU - Li, Bowen
AU - Ren, Yang
AU - Jara-Almonte, J.
AU - Chen, Li Jen
AU - Fox, William
AU - Yamada, Masaaki
AU - Alt, Andrew
AU - Goodman, Aaron
N1 - Publisher Copyright:
©2020. American Geophysical Union. All Rights Reserved.
PY - 2020/11/16
Y1 - 2020/11/16
N2 - Generation and propagation of lower hybrid drift wave (LHDW) near the electron diffusion region (EDR) during guide field reconnection at the magnetopause is studied with data from the Magnetospheric Multiscale mission and a theoretical model. Inside the current sheet, the electron beta (βe) determines which type of LHDW is excited. Inside the EDR, where the electron beta is high (βe ∼ 5), the long-wavelength electromagnetic LHDW is observed propagating obliquely to the local magnetic field. In contrast, the short-wavelength electrostatic LHDW, propagating nearly perpendicular to the magnetic field, is observed slightly away from the EDR, where βe is small (∼0.6). These observed LHDW features are explained by a local theoretical model, including effects from the electron temperature anisotropy, finite electron heat flux, electrostatics, and parallel current. The short-wavelength LHDW is capable of generating significant drag force between electrons and ions.
AB - Generation and propagation of lower hybrid drift wave (LHDW) near the electron diffusion region (EDR) during guide field reconnection at the magnetopause is studied with data from the Magnetospheric Multiscale mission and a theoretical model. Inside the current sheet, the electron beta (βe) determines which type of LHDW is excited. Inside the EDR, where the electron beta is high (βe ∼ 5), the long-wavelength electromagnetic LHDW is observed propagating obliquely to the local magnetic field. In contrast, the short-wavelength electrostatic LHDW, propagating nearly perpendicular to the magnetic field, is observed slightly away from the EDR, where βe is small (∼0.6). These observed LHDW features are explained by a local theoretical model, including effects from the electron temperature anisotropy, finite electron heat flux, electrostatics, and parallel current. The short-wavelength LHDW is capable of generating significant drag force between electrons and ions.
KW - Dispersion relation
KW - Electromagnetic fluctuation
KW - Lower hybrid drift wave
KW - Magnetic reconnection
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U2 - 10.1029/2020GL087192
DO - 10.1029/2020GL087192
M3 - Article
AN - SCOPUS:85095933130
SN - 0094-8276
VL - 47
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 21
M1 - e2020GL087192
ER -