Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh24a..03v&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SH24A-03
Other
2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2164 Solar Wind Plasma
Scientific paper
Voyager 2 crossed the termination shock in August 2007 and is making the first plasma measurements of the heliosheath. We will describe the plasma data near the termination shock and in the heliosheath and compare the plasma data with other Voyager observations. The shock was quasi-perpendicular with a shock speed of about 100 km/s. The solar wind slowed down dramatically before the shock crossing, from 400 to 300 km/s. Most of the flow energy did not go into the thermal plasma; the average proton temperature in the heliosheath was 100,000 K, well below the predicted temperature of 1,000,000K. Most the the flow energy seems to go into the pickup ions. The heliosheath is highly variable, with plasma flow speeds of 100 - 170 km/s and highly variable densities and temperatures. Voyager 2 crossed the shock at 84 AU compared to the 94 AU distance observed by V1. This difference shows that the heliosphere is asymmetric, since only about 2-3 AU of this difference can be ascribed to solar wind pressure changes.
Belcher John
Kasper Jan
Lazarus A.
Richardson Jonathan
Wang Chenjie
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