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Title: Whistler wave generation by anisotropic tail electrons during asymmetric magnetic reconnection in space and laboratory
Contributors: Yoo, Jongsoo
Jara-almonte, J.
Yerger, Evan
Wang, Shan
Qian, Tony
Le, Ari
Ji, Hantao
Yamada, Masaaki
Fox, William
Kim, Eun-Hwa
Chen, Li-Jen
Gershman, Daniel
U. S. Department of Energy contract number DE-AC02-09CH11466
Keywords: Whistler wave
Dispersion relation
Temperature anisotropy
Magnetic reconnection
Lower‐hybrid drift instability
Issue Date: Aug-2018
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Related Publication: Geophysical Research Letters, August, 2018
Abstract: Whistler wave generation near the magnetospheric separatrix during reconnection at the dayside magnetopause is studied with data from the Magnetospheric Multiscale (MMS) mission. The dispersion relation of the whistler mode is measured for the first time near the reconnection region in space, which shows that whistler waves propagate nearly parallel to the magnetic field line. A linear analysis indicates that the whistler waves are generated by temperature anisotropy in the electron tail population. This is caused by loss of electrons with a high velocity parallel to the magnetic field to the exhaust region. There is a positive correlation between activities of whistler waves and the lower-hybrid drift instability (LHDI) both in laboratory and space, indicating the enhanced transport by LHDI may be responsible for the loss of electrons with a high parallel velocity.
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Appears in Collections:Plasma Science & Technology

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