Ray Tracing Jupiter`s HOM Radio Emission

Details Ray Tracing Jupiter`s HOM Radio Emission Ray Tracing Jupiter`s HOM Radio Emission

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusm.p41b..01h&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #P41B-01

Physics

2756 Planetary Magnetospheres (5443, 5737, 6033), 6939 Magnetospheric Physics (2700), 6964 Radio Wave Propagation

Scientific paper

Cassini, Galileo, and Voyager spacecraft observations show well-defined attenuation features in the hectometer (HOM) spectrum of Jupiter's radio emission. The features are best displayed as frequency versus time spectrograms of HOM intensity between 500 - 3000 kHz. The bands have been shown by Gurnett et al. (1998) to be the result of propagation processes involving these emissions from opposite hemispheres. Enhancements in the HOM intensity and occurrence are seen along the edges of the observed attenuation features which may indicate caustic surfaces due to refraction along the propagation path. Using magnetic field and density models of the Jovian magnetosphere, we present some ray tracing analyses to show that radio wave refraction from density enhancements in the Io flux tube can produce the attenuation structures seen in the observations. This can provide boundaries to the electron density within the Io flux tube.

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