Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..613s&link_type=abstract
Astronomicheskii Zhurnal, vol. 56, May-June 1979, p. 613-622. In Russian.
Astronomy and Astrophysics
Astronomy
5
Cosmic Plasma, Interplanetary Medium, Plasma Spectra, Scintillation, Plasma Radiation, Size (Dimensions)
Scientific paper
Observational data are compared with results of a theoretical analysis of the effect of source size on the form of the time spectrum of source scintillation caused by interplanetary-plasma inhomogeneities. Satisfactory agreement is obtained for both weak and saturated scintillations. A spherically symmetric model of the interplanetary medium is found to describe the experimental spectra well in most cases, but several cases are noted which deviate from this model. It is shown that observations at elongations exceeding 60 deg, where the effect of source size on the spectrum is relatively small, are more advantageous for studying the interplanetary plasma and that the strong dependence of spectral shape on source size at elongations of the order of 30 deg makes it possible to estimate the sizes of scintillating sources.
Shishov V. I.
Shishova T. D.
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