Inhomogeneous structure and velocity of the circumsolar plasma based on data of the Venera-10 station

Details Inhomogeneous structure and velocity of the circumsolar plasma based on data of the Venera-10 station Inhomogeneous structure and velocity of the circumsolar plasma based on data of the Venera-10 station

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980azh....57..790i&link_type=abstract

(Astronomicheskii Zhurnal, vol. 57, July-Aug. 1980, p. 790-798.) Soviet Astronomy, vol. 24, July-Aug. 1980, p. 454-459. Transla

Astronomy and Astrophysics

Astronomy

9

Circumsolar Radiation, Nonuniform Plasmas, Solar Wind Velocity, Venera 10 Satellite, Electron Plasma, Energy Spectra, Plasma Frequencies, Plasma Turbulence, Radio Probing, Solar Diameter, Spatial Distribution

Scientific paper

The intensity, spatial spectrum, and velocity of inhomogeneities of the circumsolar plasma are determined and the internal scale of inhomogeneities of the medium is estimated on the basis of radio-transillumination experiments carried out with the aid of the Venera-10 station. Fluctuations in electron concentration are shown to decrease rapidly with distance from the sun, but the inhomogeneities have an increased value in the region of 12-20 solar radii. For inhomogeneities having characteristic scales of 5-80 km, the average value of the spectral index is 3.6 + or - 0.2; for inhomogeneities with sizes between 1000 and 50,000 km, it is 3.9 + or - 0.3. The spectral index of the fine-scale part of the spectrum decreases as the sun is approached, and at radial distances of less than 12 solar radii its value is close to 3. The internal scale of the circumsolar plasma turbulence has sizes on the order of several km at distances of 6-10 solar radii. Inhomogeneity velocities of 30-40 km/sec at radial distances of two to six solar radii are typical; at distances of more than 18 radii, the velocity exceeds 400 km/sec.

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