Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsh23a..08r&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SH23A-08
Physics
2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2164 Solar Wind Plasma
Scientific paper
Voyagers 1 and 2 continue to explore the heliosheath. We present results from the first 18 months of Voyager 2 plasma observations in the heliosheath. We find that the speeds observed by V1 and V2 are very different, with V2 observing radial speeds about twice those observed at V1. This difference is in the opposite direction of that predicted by models. Densities have slowly decreased across the sheath, probably due to a decrease in solar wind flux throughout the heliosphere. Temperatures are also decreasing as is the variation in these parameters. Non-radial flows observed at the heliosheath are much larger parallel to the solar equatorial plane than perpendicular plane, suggesting that termination shock is more extended in the equatorial plane and smaller at the poles.
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