Interstellar scintillations as a method for investigation of superfine radiostructure in gausars and galactic nuclei

Interstellar scintillations are proposed to be used for an investigation of superfine (< or approximately 10-5 arc sec) angular structure in quasars and nuclei of galaxies, and of its evolution. It is shown that the wavelength range around lambda = 3 cm is optimal to observe the scintillations. The expected scintillation index m approximately 1%, and characteristic scintillation time scale is about 3sup(h). Scintillation observations of compact components in quasars and galactic nuclei can be a valuable complement of results obtained by the superlong-range interferometry method