Scintillation observations near the sun

Details Scintillation observations near the sun Scintillation observations near the sun

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978clus.nasa..388c&link_type=abstract

In JPL A Close-up of the Sun p 388-396 (SEE N78-32964 23-92)

Astronomy and Astrophysics

Astronomy

3

Interplanetary Medium, Scintillation, Solar Probes, Solar Wind Velocity, Electron Density (Concentration), Interplanetary Dust, Radio Sources (Astronomy), Spectrum Analysis

Scientific paper

Results on the electron density spectrum, the random velocity and the mean velocity of the solar wind in the region from 5 to 100 solar radii are presented. Results are based on intensity scintillations of incoherent radio sources at different locations and different radio frequencies. The shape of the electron density irregularity spectrum is shown to be well modeled by a power law in wavenumber with a slope that abruptly steepens at higher wavenumbers. This two slope power law model is shown to have a break (defined as the wavenumber of the change of slope) that increases with decreasing distance from the Sun. The fractional random velocity is shown to be insignificant at distances of greater than 40 solar radii, but shows a steady increase with decreasing solar distance inside of 40 solar radii.

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