Relatively stable, large-amplitude Alfvenic waves seen at 2.5 and 5.0 AU

Details Relatively stable, large-amplitude Alfvenic waves seen at 2.5 and 5.0 AU Relatively stable, large-amplitude Alfvenic waves seen at 2.5 and 5.0 AU

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..116..377m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 116, no. 2, 1988, p. 377-390. SERC-supported research.

Physics

12

Interplanetary Medium, Magnetohydrodynamic Waves, Plasma Interactions, Solar Activity Effects, Solar Wind, Circular Polarization, Corotation, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Wave Propagation

Scientific paper

Pioneer 11 and 10 observations of the wave structure seen in a corotating interaction region at 2.5 AU on day 284 of 1973 and 8 days later at 5 AU reveal large-amplitude Alfvénic structures with many detailed correlations seen between their features at the two radial distances. Hodogram analysis suggests the dominance of near plane polarized, transverse Alfvénic mode fluctuations with periods between 2 min and one hour or more. Some wave evolution close to the corotating interaction region shock is noticed, but waves towards the centre of the compression seem to propagate with little damping between the spacecraft observation positions.

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