Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58.1268l&link_type=abstract
(Astronomicheskii Zhurnal, vol. 58, Nov.-Dec. 1981, p. 1268-1274.) Soviet Astronomy, vol. 25, Nov.-Dec. 1981, p. 720-723. Trans
Astronomy and Astrophysics
Astronomy
Interplanetary Medium, Scintillation, Solar Wind, Cross Correlation, Power Spectra, Skewness
Scientific paper
The shape of the temporal cross-correlation function of scintillations is investigated for a power-law spectrum of inhomogeneities when a velocity scatter is present in the medium. It is shown that, as in the case of a Gaussian spectrum of inhomogeneities, a velocity scatter leads to the appearance of skewness of the cross-correlation function relative to the maximum. The cross-correlation skewness of saturated scintillations with any spectrum of inhomogeneities does not exceed the skewness for weak scintillations. Estimates of the instantaneous relative velocity dispersion in the solar wind are obtained from measured values of the skewness of interplanetary scintillations. These estimates agree with the results of the dispersion method and indicate that relative motions in the solar wind play an important role in the formation of the scintillation pattern.
Chashei Igor V.
Lotova N. A.
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