Biblio

Found 2 results
Filters: Author is S. Thaller  [Clear All Filters]
2017
Authors: Li J., Bortnik J., Li W., Ma Q., Thorne R. M., et al.
Title: “Zipper-like” periodic magnetosonic waves: Van Allen Probes, THEMIS, and magnetospheric multiscale observations
Abstract: An interesting form of “zipper-like” magnetosonic waves consisting of two bands of interleaved periodic rising-tone spectra was newly observed by the Van Allen Probes, the Time History of Events and Macroscale Interactions during Substorms (THEMIS), and the Magnetospheric Multiscale (MMS) missions. The two discrete bands are distinct in frequency and intensity; however, they maintain the same periodicity which varies in space and time, suggesting that they possibly originate from one single source intrinsically. In one event, the zipper-like magnetosonic waves exhibit the same periodicity as a constant-frequency magnetosonic wave and an electrostatic emission, but the modulation comes from neither density fluctuations nor ULF waves. A statistical survey based on 3.5 years of multisat. . .
Date: 01/2017 Publisher: Journal of Geophysical Research: Space Physics DOI: 10.1002/2016JA023536 Available at: http://onlinelibrary.wiley.com/doi/10.1002/2016JA023536
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2013
Authors: Dai L, Takahashi K, Wygant J R, Chen L, Bonnell J W, et al.
Title: Excitation of Poloidal standing Alfven waves through the drift resonance wave-particle interaction
Abstract: Drift-resonance wave-particle interaction is a fundamental collisionless plasma process studied extensively in theory. Using cross-spectral analysis of electric field, magnetic field, and ion flux data from the Van Allen Probe (Radiation Belt Storm Probes) spacecraft, we present direct evidence identifying the generation of a fundamental mode standing poloidal wave through drift-resonance interactions in the inner magnetosphere. Intense azimuthal electric field (Eφ) oscillations as large as 10mV/m are observed, associated with radial magnetic field (Br) oscillations in the dawn-noon sector near but south of the magnetic equator at L∼5. The observed wave period, Eφ/Br ratio and the 90° phase lag between Br and Eφ are all consistent with fundamental mode standing Poloidal waves. Phase . . .
Date: 08/2013 Publisher: Geophysical Research Letters DOI: 10.1002/grl.50800 Available at: http://onlinelibrary.wiley.com/doi/10.1002/grl.50800/full
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