Constraints on Solar Wind Acceleration Mechanisms from ULYSSES Plasma Observations: The First Polar Pass

Details Constraints on Solar Wind Acceleration Mechanisms from ULYSSES Plasma Observations: The First Polar Pass Constraints on Solar Wind Acceleration Mechanisms from ULYSSES Plasma Observations: The First Polar Pass

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22.3309b&link_type=abstract

Geophysical Research Letters, vol. 22, p. 3309

Physics

20

Solar Wind, Acceleration (Physics), Ulysses Mission, Plasmas (Physics), Conductive Heat Transfer, Turbulence, High Speed, Flux Density, Deposition

Scientific paper

The mass flux density and velocity of the solar wind at polar latitudes can provide strong constraints on solar wind acceleration mechanisms. We use plasma observations from the first polar passage of the Ulysses spacecraft to investigate this question. We find that the mass flux density and velocity are too high to reconcile with acceleration of the solar wind by classical thermal conduction alone. Therefore acceleration of the high-speed must involve extended deposition of energy by some other mechanism, either as heat or as a direct effective pressure, due possibly to waves and/or turbulence, or completely non-classical heat transport.

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