Interactions of oblique interplanetary discontinuities and their manifestations during STIP intervals 15-19

Details Interactions of oblique interplanetary discontinuities and their manifestations during STIP intervals 15-19 Interactions of oblique interplanetary discontinuities and their manifestations during STIP intervals 15-19

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987sici.symp...57g&link_type=abstract

In Alabama Univ., Huntsville. STIP Symposium on Physical Interpretation of Solar/Interplanetary and Cometary Intervals p 57 (SEE

Physics

Discontinuity, Interplanetary Medium, Intervals, Magnetohydrodynamic Waves, Shock Waves, Alpha Particles, Magnetic Clouds, Plasma Interactions, Protons, Solar Wind

Scientific paper

The generation of slow shock waves as the result of the interaction of Alfven discontinuities with solar wind contact surfaces is considered. The latter are taken to be the boundaries of proton and alpha-particle concentration inhomogeneities. It is found that the intensity of the Alfven discontinuity may be increased as the result of its interaction with the more dense plasma. The converse (i.e., decrease of the Alfven discontinuity's intensity following interaction with a less dense plasma) is also indicated. Also discussed is the generation of a magnetic cloud as the result of the interaction of a quasi-parallel Alfven discontinuity with a dense plasma contact surface. It is shown that the (solar-generated) Alfven discontinuity may then be transformed into non-flare fast and slow shock waves as the result of this interaction. Thus, it is indicated that some fast shock waves in the solar wind may have a nonsolar origin.

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