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Voyager observations of solar wind proton temperature - 1-10 AUSimultaneous measurements are made of the solar wind proton temperatures by the Voyager 1 and 2 spacecraft, far from earth, and the IMP 8 spacecraft in earth orbit. This technique permits a separation of radial and temporal variations of solar wind parameters. The average value of the proton temperature between 1 and 9 AU is observed to decrease as r (the heliocentric radius) to the -(0.7 + or - 0.2). This is slower than would be expected for adiabatic expansion. A detailed examination of the solar wind stream structure shows that considerable heating occurs at the interface between high and low speed streams.
Document ID
19820047282
Document Type
Reprint (Version printed in journal)
Authors
Gazis, P. R. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Lazarus, A. J. (MIT Cambridge, MA, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Geophysical Research Letters
Volume: 9
Subject Category
SOLAR PHYSICS
Funding Number(s)
OTHER: JPL-953733
CONTRACT_GRANT: NAS5-27590
PROJECT: PROJECT VOYAGER
OTHER: NGL-22-009-015
Distribution Limits
Public
Copyright
Other