Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1302..231r&link_type=abstract
PICKUP IONS THROUGHOUT THE HELIOSPHERE AND BEYOND: Proceedings of the 9th Annual International Astrophysics Conference. AIP Con
Astronomy and Astrophysics
Astrophysics
Pickups, Solar Wind, Shock Waves, Interstellar Matter, Pickup Ions, Particle Emission, Solar Wind, Planetary Bow Shocks, Interplanetary Shocks, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus
Scientific paper
Voyager 2 has observed the effects of pickup ions since about 20 AU, first in pressure-balance structures and then in the slowdown and heating of the solar wind. By the time Voyager 2 (V2) reached the termination shock (TS), the speed had decreased by about 17% due to mass-loading by pickup ions. At the TS, most of the flow energy did not go into the thermal ions but instead heated these pickup ions. ICME-driven shocks are studied and compared to planetary bow shocks and the TS to see if pickup ions affect the heating at these shocks. The percentage of reflected ions at interplanetary shocks increases to about 35 AU and is similar to the percentage observed in planetary magnetosheaths at the same distance. However, outside 35 AU, no reflected thermal ions are observed downstream of interplanetary shocks or the TS, likely because pickup ions dominate the thermal plasma pressure outside this distance.
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