Jovian electron propagation out of the solar equatorial plane - Pioneer 11 observations

Details Jovian electron propagation out of the solar equatorial plane - Pioneer 11 observations Jovian electron propagation out of the solar equatorial plane - Pioneer 11 observations

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228l.123h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 228, Mar. 15, 1979, p. L123-L127.

Astronomy and Astrophysics

Astrophysics

10

Electron Flux Density, Jupiter (Planet), Pioneer 2 Space Probe, Planetary Radiation, Solar Electrons, Diffusion Coefficient, Equatorial Orbits, Interplanetary Magnetic Fields, Particle Diffusion, Spacecraft Trajectories, Spectroheliographs, Three Dimensional Models, Jupiter, Pioneer 11, Electrons, Flux, Solar Flare, Charged Particles, Magnetosphere, Observations, Models, Modulations, Diffusion, Convection, Cosmic Dust

Scientific paper

Jovian electron intensity in the energy range 2-7 MeV was measured along the trajectory of Pioneer 11 up to 16 deg heliographic latitude. These electrons have crossed the average direction of the interplanetary magnetic field, propagating normal to the solar equatorial plane, and their intensity continues to be modulated by corotating interaction regions over this latitude range. From these data, the electron diffusion coefficient perpendicular to the equatorial plane (K2 = 2 x 10 to the 20th sq cm/s) was derived to within a factor 2 using a three-dimensional diffusion-convection model and the values of the parallel and perpendicular diffusion coefficients in the solar equatorial plane (Ky = 5 x 10 to the 22nd sq cm/s, K2 = 10 to the 21st sq cm/s, respectively), which had previously successfully described Jovian electron propagation near the equatorial plane from 1 to about 10 AU. These results indicate that the Jovian electron intensity may be very low at high solar latitudes.

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