Protons and Electrons in Jupiter's Magnetic Field: Results from the University of Chicago Experiment on Pioneer 10

Details Protons and Electrons in Jupiter's Magnetic Field: Results from the University of Chicago Experiment on Pioneer 10 Protons and Electrons in Jupiter's Magnetic Field: Results from the University of Chicago Experiment on Pioneer 10

Jan 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974sci...183..306s&link_type=abstract

Science, Volume 183, Issue 4122, pp. 306-309

Physics

28

Scientific paper

Fluxes of high energy electrons and protons are found to be highly concentrated near the magnetic equatorial plane from distances of ~ 30 to ~ 100 Jovian radii (RJ). The 10-hour period of planetary rotation is observed as an intensity variation, which indicates that the equatorial zone of high particle fluxes is inclined with respect to the rotation axis of the planet. At radial distances lesssim 20 RJ the synchrotron-radiation-producing electrons with energies gtrsim 3 million electron volts rise steeply to a maximum intensity of ~ 5 × 108 electrons per square centimeter per second near the periapsis at 2.8 RJ. The flux of protons with energies gtrsim 30 million electron volts reaches a maximum intensity of ~ 4 × 106 protons per square centimeter per second at ~ 3.5 RJ with the intensity decreasing inside this radial distance. Only for radial distances lesssim 20 RJ does the radiation behave in a manner which is similar to that at the earth. Burst of electrons with energies up to 30 million electron volts, each lasting about 2 days, were observed in interplanetary space beginning approximately 1 month before encounter. This radiation appears to have escaped from the Jovian bow shock or magnetosphere.

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