Plasma evolution in the heliosheath

Details Plasma evolution in the heliosheath Plasma evolution in the heliosheath

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh13c..04r&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH13C-04

Physics

[2124] Interplanetary Physics / Heliopause And Solar Wind Termination

Scientific paper

Voyager 2 is now at 97 AU probably about 20 AU deep into the heliosheath. The Plasma Science experiment provides the only direct observations of plasma in the heliosheath. The plasma parameters depend on many factors; the solar wind source, the motions of the termination shock, and the influence of the interstellar medium among them. I will present the most recent plasma observations. Plasma speeds observed at Voyager 2 have decreased slowly across the heliosheath and remain well above those inferred at Voyager 1. The Voyager 2 flow angles continue to increase with large flows in the T than N directions (RTN coordinates). The density and temperature have decreased across the heliosheath until the beginning of 2011; since then the density has increased by a factor of 2 and the speed and temperature have also increased.

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