HR: 15:20h
AN: SH43B-07 INVITED     [Abstracts]
TI: The Acceleration of Low-Energy Ions at the Termination Shock of the Solar Wind
AU: * Fisk, L A
EM: lafisk@umich.edu
AF: University of Michigan, Atmospheric, Oceanic, and Space Sciences 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Gloeckler, G
EM: ggloeck@umd.edu
AF: University of Michigan, Atmospheric, Oceanic, and Space Sciences 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AU: Gloeckler, G
EM: ggloeck@umd.edu
AF: University of Maryland, Dept. of Physics, College Park, MD 20742-4111 United States
AU: Zurbuchen, T H
EM: thomasz@umich.edu
AF: University of Michigan, Atmospheric, Oceanic, and Space Sciences 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AB: The Voyager 1 investigators have reported that the spacecraft crossed the Termination Shock of the solar wind at 94 AU from the Sun. The intensity of low-energy ions (<3 Mev/nucleon) increases abruptly at the shock. It is argued in this talk that the low-energy ions at the Termination Shock are behaving like a simple ideal gas, without heat flux, and that both the observed spectra of the ions and the observed increases in intensity are consistent with the low-energy ions behaving according to the standard Rankine-Hugoniot relationships. There is no evidence at the shock crossing for diffusive shock acceleration. The approach taken here is contrasted with diffusive shock acceleration, and the implications of the conclusions from this work for the acceleration of superthermal tails on the distribution of particles in the solar wind and for the origin of Anomalous Cosmic Rays are discussed.
DE: 2114 Energetic particles (7514)
DE: 2124 Heliopause and solar wind termination
DE: 2139 Interplanetary shocks
DE: 2152 Pickup ions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005