Structure and evolution of compound streams at not greater than 1 AU

Details Structure and evolution of compound streams at not greater than 1 AU Structure and evolution of compound streams at not greater than 1 AU

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9621213b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 21,213-21,225.

Astronomy and Astrophysics

Astronomy

38

Cosmic Rays, Plasma Diagnostics, Radio Sources (Astronomy), Space Plasmas, Diurnal Variations, Interplanetary Magnetic Fields, Plasma Density, Satellite Observation

Scientific paper

Two cases of compound stream formation and evolution at heliocentric distances of not greater than 1 AU have been studied using simultaneous data from both multipoint in situ and global sources. The sequences of events analyzed occurred around December 16, 1978, and February 19, 1979, respectively. The sources of the multipoint observations were Helios A, Helios B, IMP 8, and ISEE 3. The global observations were obtained by interplanetary scintillation analysis of radio sources. It was found that the radio and in situ data complemented each other and that both were needed for a unique interpretation of complex, time-dependent flows. The cases studied show that a single corotating stream can interact with different transient flows at different times, and a single transient flow can interact with different corotating streams at different times. In each instance, a compound stream is formed. This work further shows that the cosmic ray intensity at a point depends on the global compound stream configuration in the vicinity of the point.

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