Jovian Dual-Sinusoidal HOM lane features observed by Galileo

Details Jovian Dual-Sinusoidal HOM lane features observed by Galileo Jovian Dual-Sinusoidal HOM lane features observed by Galileo

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..389h&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 3, p. 389-392

Physics

2

Magnetospheric Physics: Planetary Magnetospheres, Planetology: Fluid Planets: Magnetospheres, Radio Science: Magnetospheric Physics

Scientific paper

A well defined sinusoidal-shaped ``band'' of reduced emission intensity exists within Jovian HOM from 500 kHz to 3 MHz at all Jovian longitudes as observed by the Galileo spacecraft. A less prominent sinusoidal-shaped band feature exists in the same frequency range but is 180° out of phase with the more prominent feature. We used a multiple Jovian rotation spectrogram technique to fully display both bands and found that these sinusoidal-shaped features are the source of the ``lanes'' previously studied in Voyager and Ulysses data. Our extension of the simple straight-line ray model by Gurnett et al. [1998] provides a qualitative explanation for the observed features. We found that the two sinusoidal bands show an asymmetry about the longitude of the northern tip of the magnetic dipole (202° CML). Enhancements of emission can be seen along the edges of the bands which may be interpreted as caustic surfaces.

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