Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 10, 1981 | public
Journal Article

Energetic Charged Particles in Saturn's Magnetosphere: Voyager 1 Results


Voyager 1 provided the first look at Saturn's magnetotail and magnetosphere during relatively quiet interplanetary conditions. This report discusses the energetic particle populations of the outer magnetosphere of Saturn and absorption features associated with Titan and Rhea, and compares these observations with Pioneer 11 data of a year earlier. The trapped proton fluxes had soft spectra, represented by power laws E^–γ in kinetic energy E, with γ ∼ 7 in the outer magnetosphere and γ ∼ 9 in the magnetotail. Structure associated with the magnetotial was observed as close as 10 Saturn radii (Rs) on the outbound trajectory. The proton and electron fluxes in the outer magnetosphere and in the magnetotail were variable and appeared to respond to changes in interplanetary conditions. Protons with energies ≥ 2 million electron volts had free access to the magnetosphere from interplanetary space and were not stably trapped outside ∼ 7.5 Rs.

Additional Information

© 1981 American Association for the Advancement of Science. Received for publication 9 February 1981. We thank the Voyager project members and the enthusiastic staff of our laboratories at Caltech and Goddard Space Flight Center for their splendid support. Special thanks go to W. Althouse, N. Gehrels, and I. Matus (Caltech), W. Davis, H. Domchick, and D. Stilwell (Goddard), and E. Franzgrote (Jet Propulsion Laboratory). Supported by NASA under NAS7-100 and NGR 05-002-160.

Additional details

August 19, 2023
October 25, 2023