Computer Science
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8323261g&link_type=abstract
Unknown
Computer Science
Bow Waves, Jupiter (Planet), Magnetic Flux, Magnetohydrodynamics, Magnetosonic Resonance, Solar Wind, Voyager 2 Spacecraft, Data Processing, Eigenvalues, Fourier Transformation, Frequencies, Power Spectra, Solar Orbits, Solar Protons, Wind Velocity
Scientific paper
Observations of large amplitude magnetohydrodynamics (MHD) waves upstream of Jupiter's bow shock are analyzed. The waves are found to be right circularly polarized in the solar wind frame which suggests that they are propagating in the fast magnetosonic mode. A complete spectral and minimum variance eigenvalue analysis of the data was performed. The power spectrum of the magnetic fluctuations contains several peaks. The fluctuations at 2.3 mHz have a direction of minimum variance along the direction of the average magnetic field. The direction of minimum variance of these fluctuations lies at approximately 40 deg. to the magnetic field and is parallel to the radial direction. We argue that these fluctuations are waves excited by protons reflected off the Jovian bow shock. The inferred speed of the reflected protons is about two times the solar wind speed in the plasma rest frame. A linear instability analysis is presented which suggests an explanation for many of the observed features of the observations.
Goldstein Michel L.
Matthaeus William H.
Smith Walter C.
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