Scintillation of an extended source by interstellar plasma inhomogeneities

Details Scintillation of an extended source by interstellar plasma inhomogeneities Scintillation of an extended source by interstellar plasma inhomogeneities

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53...26c&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, no. 1, 1976, p. 26-32. In Russian.

Astronomy and Astrophysics

Astronomy

9

Cosmic Plasma, Interstellar Gas, Nonuniform Plasmas, Radio Sources (Astronomy), Scintillation, Differential Equations, Frequency Response, Point Sources, Quasars, Statistical Correlation

Scientific paper

The spatial-frequency correlation function for saturated scintillations of a radio source of finite angular size is analyzed in the context of the thin-phase-screen and extended-medium models. It is shown that the frequency-correlation radius and the characteristic scale of the diffraction pattern are practically independent of angular source size in the extended-medium model, while the dependence of these two parameters on source size is rather strong in the thin-screen model. It is concluded that this situation opens the possibility of using differential measurements at two spaced frequencies to observe quasar scintillations due to interstellar plasma inhomogeneities.

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