Other
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9113694n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Dec. 1, 1986, p. 13694-13698.
Other
20
Kelvin-Helmholtz Instability, Solar Wind, Solar Wind Velocity, Magnetic Variations, Velocity Distribution
Scientific paper
Three-dimensional Helios plasma and field data are used to investigate the relative changes in direction of the velocity and magnetic field vectors across tangential discontinuities (TDs) in the solar wind at solar distances of 0.29-0.50 AU. It is found for TDs with large Delta-v and (Delta-B)/B that Delta-v and Delta-B are closely aligned with each other, in agreement with the unexpected results of previous studies of TDs observed at 1 AU and beyond. It is shown that this effect probably results from the destruction by the Kelvin-Helmholtz instability of TDs for which Delta-v and Delta-B are not aligned. The observed decrease in the number of interplanetary discontinuities with increasing solar distance may be associated with the growth of the Kelvin-Helmholtz instability with decreasing Alfven speed.
Alexander Claudia J.
Neugebauer Matthias
Richter Arne K.
Schwenn Rainer
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