Premium
Lower Hybrid Drift Waves During Guide Field Reconnection
Author(s) -
Yoo Jongsoo,
Ji JeongYoung,
Ambat M. V.,
Wang Shan,
Ji Hantao,
Lo Jenson,
Li Bowen,
Ren Yang,
JaraAlmonte J.,
Chen LiJen,
Fox William,
Yamada Masaaki,
Alt Andrew,
Goodman Aaron
Publication year - 2020
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2020gl087192
Subject(s) - physics , current sheet , electron , magnetic reconnection , magnetopause , wavelength , magnetic field , computational physics , lower hybrid oscillation , electric field , anisotropy , field (mathematics) , atomic physics , magnetohydrodynamics , magnetosphere , optics , electromagnetic electron wave , quantum mechanics , mathematics , pure mathematics
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 ( β e ) determines which type of LHDW is excited. Inside the EDR, where the electron beta is high ( β e ∼ 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 β e 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.