Test particle simulation study of whistler wave packets observed near comet Giacobini-Zinner

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/GL016i001p00025· OSTI ID:5838546

Kaya, N ^[1]; Matsumoto, H; Tsurutani, B T ^[2]

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1. Kobe Univ. (Japan)
2. Kyoto Univ. (Japan) California Institute of Technology, Pasadena (USA)

In order to study nonlinear interactions of water group ions with large amplitude whistler wave packets detected at the leading edge of steepened magnetosonic waves observed near comet Giacobini-Zinner, the authors carried out test particle simulations of water ion interactions with a model wave based on the G-Z data. As the model wave, they adopted a linearly polarized magnetosonic (MS) wave as the trailing portion of the wave, and circularly polarized whistler waves in the leading edge of the wave. Both the MS and whistler waves are a priori assumed to have large amplitudes. They found that some of the water ions are decelerated in the steepened portion of the magnetosonic wave to the resonance velocity with the whistler wave packets. Through resonance and related nonlinear interaction with the large amplitude whistler waves, the water ions become trapped by the whistler wave packet. An energy balance calculation demonstrates that the trapped ions do lose their kinetic energy during the trapped motion in the whistler wave packet. It is thus demonstrated that the nonlinear trapping motion in the wave structure leads to the effective energy transfer from the water group ions to the whistler wave packets in the leading edge of the steepened MHD waves.

• OSTI ID: 5838546
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Vol. 16:1; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMETS
WHISTLERS
ACCELERATION
COMPUTERIZED SIMULATION
ENERGY TRANSFER
MAGNETOACOUSTIC WAVES
MOLECULAR IONS
NONLINEAR PROBLEMS
TEST PARTICLES
WATER
WAVE PACKETS
WAVE PROPAGATION
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
HYDROMAGNETIC WAVES
IONS
NOISE
OXYGEN COMPOUNDS
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
SIMULATION
640107* - Astrophysics & Cosmology- Planetary Phenomena