The latitude and radial dependence of shock acceleration in the heliosphere

Details The latitude and radial dependence of shock acceleration in the heliosphere The latitude and radial dependence of shock acceleration in the heliosphere

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..991g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Feb. 1, 1988, p. 991-996.

Physics

18

Acceleration (Physics), Heliosphere, Interplanetary Medium, Shock Wave Propagation, Cross Correlation, Energy Spectra, Long Term Effects, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

Voyager 1 and 2 observations of ions accelerated at corotating shocks within about 13-28 AU are discussed. The ion spectra extend smoothly from at least 30 keV to an energy above about 3 MeV. However, these spectra are falling steeply at the other end. The event-avaraged energy spectra during 1984 are similar for both Voyagers, and the event-averaged spectra at Voyager 2 are of similar form both before and after the flux decrease in early 1985. The event-averaged intensities of about 1 MeV protons exhibit an about -3 percent per degree gradient before and after the early 1985 intensity decrease. The significance of these observations for interpreting the shock acceleration is addressed.

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