Observations of plasma waves in the solar wind interaction region of Comet Giacobini-Zinner at high time resolution

Details Observations of plasma waves in the solar wind interaction region of Comet Giacobini-Zinner at high time resolution Observations of plasma waves in the solar wind interaction region of Comet Giacobini-Zinner at high time resolution

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9719157m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A12, p. 19,157-19,162.

Physics

Doppler Effect, Giacobini-Zinner Comet, Heavy Ions, Plasma Waves, Shock Wave Interaction, Solar Wind, Electron Plasma, High Resolution, International Sun Earth Explorer 3, Plasma Frequencies, Plasma-Particle Interactions, Rankine-Hugoniot Relation

Scientific paper

High-time-resolution spectra of plasma wave emissions detected in the interaction region of Comet Giacobini-Zinner with the solar wind reveal a wave phenomenology much more complicated than first reported. Spectra often exhibit three or more independent peaks, which become more prominent the deeper into the interaction region the spacecraft traversed. The main peaks correspond to whistler emissions below the electron cyclotron frequency, a midfrequency peak near the maximum Doppler shift frequency for waves with k lambda(D) = 1, a high-frequency peak above the Doppler shift maximum frequency, and electron plasma oscillations at the plasma frequency. Similar multipeaked spectra are also observed downstream from weak shocks at Earth, which suggests that the plasma wave generation mechanisms responsible need not require particle populations created by photoionization.

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