An explanation for the lack of ion cyclotron wave generation by pickup ions at Titan: 1-D hybrid simulation results

2010 ◽  
Vol 115 (A10) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. M. Cowee ◽  
S. P. Gary ◽  
H. Y. Wei ◽  
R. L. Tokar ◽  
C. T. Russell
Keyword(s):  
Hybrid Simulation ◽  
Wave Generation ◽  
Pickup Ions ◽  
Ion Cyclotron ◽  
Simulation Results

scholarly journals Ion cyclotron instability at Io: Hybrid simulation results compared to in situ observations

2016 ◽  
Vol 121 (8) ◽  
pp. 7514-7534 ◽  
Author(s):  
Ondřej Šebek ◽  
Pavel M. Trávníček ◽  
Raymond J. Walker ◽  
Petr Hellinger
Keyword(s):  
Hybrid Simulation ◽  
Cyclotron Instability ◽  
Ion Cyclotron ◽  
In Situ Observations ◽  
Simulation Results

scholarly journals Impact of Foreshock Transients on the Flank Magnetopause and Magnetosphere and the Ionosphere

2021 ◽  
Vol 8 ◽  
Author(s):  
Chih-Ping Wang ◽  
Xueyi Wang ◽  
Terry Z. Liu ◽  
Yu Lin
Keyword(s):  
Magnetic Field ◽  
3D Structure ◽  
Hybrid Simulation ◽  
High Density ◽  
Low Density ◽  
Simulation Results ◽  
Ground Magnetic ◽  
Pressure Perturbations

Mesoscale (on the scales of a few minutes and a few RE) magnetosheath and magnetopause perturbations driven by foreshock transients have been observed in the flank magnetotail. In this paper, we present the 3D global hybrid simulation results to show qualitatively the 3D structure of the flank magnetopause distortion caused by foreshock transients and its impacts on the tail magnetosphere and the ionosphere. Foreshock transient perturbations consist of a low-density core and high-density edge(s), thus, after they propagate into the magnetosheath, they result in magnetosheath pressure perturbations that distort magnetopause. The magnetopause is distorted locally outward (inward) in response to the dip (peak) of the magnetosheath pressure perturbations. As the magnetosheath perturbations propagate tailward, they continue to distort the flank magnetopause. This qualitative explains the transient appearance of the magnetosphere observed in the flank magnetosheath associated with foreshock transients. The 3D structure of the magnetosheath perturbations and the shape of the distorted magnetopause keep evolving as they propagate tailward. The transient distortion of the magnetopause generates compressional magnetic field perturbations within the magnetosphere. The magnetopause distortion also alters currents around the magnetopause, generating field-aligned currents (FACs) flowing in and out of the ionosphere. As the magnetopause distortion propagates tailward, it results in localized enhancements of FACs in the ionosphere that propagate anti-sunward. This qualitatively explains the observed anti-sunward propagation of the ground magnetic field perturbations associated with foreshock transients.

scholarly journals Ion cyclotron waves, pickup ions, and Io's neutral exosphere

2000 ◽  
Vol 105 (A11) ◽  
pp. 25379-25389 ◽  
Author(s):  
F. J. Crary ◽  
F. Bagenal
Keyword(s):  
Pickup Ions ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

scholarly journals On the Impacts of Ions of Ionospheric Origin and Their Composition on Magnetospheric EMIC Waves

2021 ◽  
Vol 8 ◽  
Author(s):  
Justin H. Lee ◽  
Lauren W. Blum ◽  
Lunjin Chen
Keyword(s):  
Wave Generation ◽  
Magnetospheric Plasma ◽  
Large Numbers ◽  
Emic Wave ◽  
Direct Measurements ◽  
Ion Cyclotron ◽  
Earth's Magnetosphere ◽  
Ion Species ◽  
Emic Waves

Large numbers of theory and observation studies have been conducted on electromagnetic ion cyclotron (EMIC) waves occurring in Earth’s magnetosphere. Numerous studies have shown that accurately specifying the ions of ionospheric origin and their composition can greatly improve understanding of magnetospheric EMIC waves, specifically their generation, their properties, and their effects on the magnetospheric plasma populations. With the launch and operations of multiple recent missions carrying plasma instrumentation capable of acquiring direct measurements of multiple ion species, we use this opportunity to review recent magnetospheric EMIC wave efforts utilizing these new assets, with particular focus on the role of ions of ionospheric origin in wave generation, propagation, and interaction with particles. The review of progress leads us to a discussion of the unresolved questions to be investigated using future modeling capabilities or when new missions or instrumentation capabilities are developed.

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