Relativistic electrons at geosynchronous orbit, interplanetary electron flux, and the 13-month Jovian synodic year

Details Relativistic electrons at geosynchronous orbit, interplanetary electron flux, and the 13-month Jovian synodic year Relativistic electrons at geosynchronous orbit, interplanetary electron flux, and the 13-month Jovian synodic year

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16.1129c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Oct. 1989, p. 1129-1132.

Physics

4

Geosynchronous Orbits, Interplanetary Medium, Jupiter Atmosphere, Magnetospheric Electron Density, Relativistic Electron Beams, Electron Energy, Interplanetary Magnetic Fields, Planetary Magnetospheres, Jupiter, Electrons, Flux, Magnetic Fields, Periodicity, Intensity, Cycles, Magnetosphere, Orbits, Circulation, Acceleration, Timescale, Electromagnetic Properties

Scientific paper

Results are reported from a search to determine the correlation, if any, between the temporal behaviors of 0.2-7 MeV or higher electrons at GEO (6.6 earth radii) and 6-10 MeV electrons in the interplanetary region near earth at the period of the Jovian synodic year (about 13 months). The 13-month intensity variation results from the synodic interplanetary magnetic field conection of earth to Jupiter. Direct compariosn of intensity-time flux profiles for the years 1976-1984, about 7 synodic Jovian electron seasons, shows that the intensity envelope of peak electron flux at GEO does not appear to be correlated to the observed 13 month intensity envelope of relativistic electron flux in the interplanetary region near earth. A persistent 13-month variation of GEO flux is not obvious, thus indicating that the intensity of electron flux at GEO is not directly and soley related to the intensity of Jovian electron flux near earth. It is concluded that dynamic erergization and redistribution processes in earth's magnetosphere must be invoked to produce the intensity variations of relativistic electron flux at GEO and not interplanetary magnetic field connection to Jupiter.

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