The relationship between proton temperature and momentum flux density in the solar wind

Details The relationship between proton temperature and momentum flux density in the solar wind The relationship between proton temperature and momentum flux density in the solar wind

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..640l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, July 1986, p. 640-643.

Physics

9

Momentum Transfer, Proton Energy, Solar Wind, Flow Velocity, Flux Density, Helios 1, Subsonic Flow, Supersonic Flow

Scientific paper

The relationship between proton temperature and momentum flux density per unit mass at 1 AU is examined using Helios 1 solar wind data from 1974 to 1980. In high-speed plasma (V > 500 km s-1)Tp increases with increasing n0V2, where n0 and Tp are the density and proton temperature at 1 AU and V is the flow speed. In low-speed plasma (V < 500 km s-1), Tp does not increase with increasing n0V2, and perhaps tends to decrease slightly. These basic relationships between Tp and n0V2 are not significantly affected by stream interactions. A qualitative explanation of these results is offered in the context of a solar wind model that includes deposition of momentum and energy extending well outward into the interplanetary medium.

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