Ions of Jovian origin observed by Voyager 1 and 2 in interplanetary space
Authors:
- R. D. ZwicklRZR. D. Zwickl
- S. M. KrimigisSKS. M. Krimigis
- T. P. ArmstrongTAT. P. Armstrong
- L. J. LanzerottiLLL. J. Lanzerotti
- 1 June 1980
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 7 (6) , 453-456
Abstract
Burst‐like and long‐lived ion fluxes (E ≳ 30 keV) of Jovian origin have been observed in interplanetary space by the LECP instrument on the Voyager 1 and 2 spacecraft. Burst (few minute duration) events are observed at distances greater than 0.6 AU (1200 RJ) from Jupiter. These events are highly anisotropic and possess steep energy spectra, while long‐lived (>8 hour duration) events have relatively steady fluxes at low energies, strong anisotropies that decay with time, and a variable high energy component. Both types of events usually display simultaneous onsets and sharp cutoffs for all energies, an excess of atomic number Z ≥ 6 particles compared to solar and interplanetary events, and particle flow directions pointed away from Jupiter along the local interplanetary magnetic field. The origin for the long‐lived events appears to be inside the bow shock of the planet.Keywords
This publication has 10 references indexed in Scilit:
- Energetic (∼ 100‐keV) tailward‐directed ion beam outside the Jovian plasma boundaryGeophysical Research Letters, 1980
- Low-Energy Charged Particle Environment at Jupiter: A First LookScience, 1979
- Simultaneous measurements of energetic protons and electrons in the distant magnetosheath, magnetotail, and upstream in the solar windGeophysical Research Letters, 1978
- Observations of two distinct populations of bow shock ions in the upstream solar windGeophysical Research Letters, 1978
- The Low Energy Charged Particle (LECP) experiment on the Voyager spacecraftSpace Science Reviews, 1977
- Observations of magnetospheric bursts of high-energy protons and electrons at ∼35REwith Imp 7Journal of Geophysical Research, 1976
- Jovian electron bursts: Correlation with the interplanetary field direction and hydromagnetic wavesJournal of Geophysical Research, 1976
- Interplanetary Mev electrons of Jovian originJournal of Geophysical Research, 1974
- 30- to 100-keV protons upstream from the Earth's bow shockJournal of Geophysical Research, 1974
- Outward flow of protons from the Earth's bow shockJournal of Geophysical Research, 1968