Large-scale density structures in the outer heliosphere

Details Large-scale density structures in the outer heliosphere Large-scale density structures in the outer heliosphere

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...41b&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 6, p. 41-46.

Computer Science

8

Heliosphere, Plasma Density, Solar Wind Velocity, Voyager 2 Spacecraft, Interstellar Magnetic Fields, Plasma Composition, Solar Protons

Scientific paper

The Plasma Science experiment on the Voyager 2 spacecraft has measured the solar wind density from 1 to 38 AU. Over this distance, the solar wind density decreases as the inverse square of the heliocentric distance. However, there are large variations in this density at a given radius. Such changes in density are the dominant cause of changes in the solar wind ram pressure in the outer heliosphere and can cause large perturbations in the location of the termination shock of the solar wind. Following a simple model suggested by Suess, we study the non-equilibrium, dynamic location of the termination shock as it responds to these pressure changes. The results of this study suggest that the termination shock is rarely if ever at its equilibrium distance and may depart from that distance by as much as 50 AU at times.

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