Three views of two giant streams: Aligned observations at 1 AU, 4.6 AU, and 5.9 AU

Details Three views of two giant streams: Aligned observations at 1 AU, 4.6 AU, and 5.9 AU Three views of two giant streams: Aligned observations at 1 AU, 4.6 AU, and 5.9 AU

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2267s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 20, p. 2267-2270

Physics

20

Corotation, Interplanetary Magnetic Fields, Rotational States, Shock Waves, Solar Activity Effects, Solar Rotation, Solar Wind, Atmospheric Models, Correlation, Entropy, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Reversed Flow, Time Series Analysis

Scientific paper

A close radial alignment of the Interplanetary Monitoring Platform (IMP) and Pioneers 10 and 11 spacecraft in 1974 allows a nearly unambiguous, empirical study of the radial evolution of the interaction regions of two contrasting weak and strong, giant streams. The study confirms the main aspects of the standard model of corotating interaction regions: an expanding and strengthening pair of forward-reverse shocks sandwich a stream interface. It adds the follwoing concepts: stream group speed--the speed at the stream interface tends to remain constant with distance; corotating stream complexes--interaction regions can include features like noncompressive density enhancements and streamer belts; secondary interfaces--a possible precursor to the reverse shock; and emerging stream interfaces--one emerged between 1 AU and 4.6 AU. The study uses the conservation specific entropy to correlate features between spacecraft.

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