The radial evolution of enhanced scintillation regions

Details The radial evolution of enhanced scintillation regions The radial evolution of enhanced scintillation regions

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nuria..34....1h&link_type=abstract

Nagoya University, Research Institute of Atmospherics, Proceedings (ISSN 0077-264X), vol. 34, March 1987, p. 1-7.

Astronomy and Astrophysics

Astronomy

Interplanetary Medium, Radio Sources (Astronomy), Scintillation, Solar Wind, Statistical Analysis, Wind Velocity, Flux Density, Line Of Sight, Plasma Density, Space Plasmas, Very High Frequencies

Scientific paper

Observations of scintillation index and solar wind velocity using a grid of sources at 327 MHz makes it possible to study the radial evolution of enhanced scintillation regions between 0.3-1.0 AU and at a large range of heliocentric latitudes. Statistical analysis as well as the study of specific events during the declining phase of the solar cycle show that enhanced scintillation regions associated with compressed plasma density due to the interaction between fast and slow solar wind flows develop only beyond 0.5 AU. At distances less than 0.5 AU, the scintillation index varies in a similar manner to the variations in plasma density as observed by space probes at the same distances from the sun.

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