Interstellar Scintillation and Clouds of the Interstellar Turbulent Plasma
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Data on interstellar diffraction and refraction scintillation of pulsars are analyzed. Comparisonbetween theory and the observational data shows that two types of spectra for electron densityfluctuations are realized in the interstellar medium: pure power law and piecewise with a break.The distribution of turbulent plasma in the Galaxy has a three component structure. Component Ais diffuse and it is distributed outside of the spiral arms of the Galaxy. Component BI is cloudyand associated with Galactic arms. Component BII is extremely nonuniform and associated withHII regions and supernova remnants. The origin of the interstellar plasma turbulence is considered,and possible sources of turbulent energy are discussed. The contribution of supernova bursts in theinterstellar gas ionization and generation of turbulence are analyzed among other factors.
KeywordInterstellar plasma; Scintillation; Turbulence
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