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Gap Formation Around 0.5 Omega(e) in the Whistler-Mode Waves Due To the Plateau-Like Shape in the Parallel Electron Distribution: 2D PIC Simulations


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dc.contributorQuanming Lu, qmlu@ustc.edu.cnen_US
dc.creatorChen, Huayue
dc.creatorGao, Xinliang
dc.creatorLu, Quanming
dc.creatorFan, Kai
dc.creatorKe, Yangguang
dc.creatorWang, Xueyi
dc.creatorWang, Shui
dc.date.accessioned2022-10-12T15:31:26Z
dc.date.available2022-10-12T15:31:26Z
dc.date.created2022
dc.identifier10.1029/2021JA030119en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JA030119en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50389
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-457
dc.description.abstractThe power gap around 0.5 Omega(e) (where Omega(e) is the equatorial electron gyrofrequency) of whistler-mode waves is commonly observed in the Earth's inner magnetosphere, but its generation mechanism is still under debate. By performing two-dimensional particle-in-cell simulations in a uniform background magnetic field, we investigate the spectral properties of whistler-mode waves excited by temperature anisotropic electrons. The waves have positive growth rates in a wide range of normal angles (theta approximate to 0 degrees-35 degrees), resulting in the generation of both parallel and nonparallel waves. Although the nonparallel wave modes are weaker than the parallel ones, they can cause the plateau-like shape around 0.5 V-Ae (where V-Ae represent the electron Alfven speed) in the parallel direction of electron velocity distribution. The plateau-like electron component can then lead to severe damping in the waves around 0.5 Omega(e )via the cyclotron resonance, and the power gap is formed. This mechanism is called as spectrum bite. Our study sheds fresh light on the well-known gap formation at similar to 0.5 Omega(e )in the whistler-mode waves, which is ubiquitously detected near the equator in the inner magnetosphere.en_US
dc.formatPDFen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofJournal of Geophysical Research: Space Physicsen_US
dc.relation.ispartofseries2169-9380en_US
dc.rights©American Geophysical Union 2022. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Chen, Huayue, et al. "Gap Formation Around 0.5 Ωe in the Whistler‐Mode Waves Due To the Plateau‐Like Shape in the Parallel Electron Distribution: 2D PIC Simulations." Journal of Geophysical Research: Space Physics 127.5 (2022): e2021JA030119.en_US
dc.subjectMultiband chorusen_US
dc.subjectBanded chorusen_US
dc.subjectSource-regionen_US
dc.subjectmagnetosphereen_US
dc.subjectaccelerationen_US
dc.titleGap Formation Around 0.5 Omega(e) in the Whistler-Mode Waves Due To the Plateau-Like Shape in the Parallel Electron Distribution: 2D PIC Simulationsen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume127en_US
dc.citation.issue5en_US
dc.citation.spagee2021JA030119en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-7619-701Xen_US

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