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Interstellar Scintillation and Clouds of the Interstellar Turbulent Plasma

Published online by Cambridge University Press:  12 April 2016

V.I. Shishov
V.I. Shishov*
Affiliation:
P.N. Lebedev Physical Institute, Leninskii pr. 53, 117924 Moscow, Russia

Abstract

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Data on interstellar diffraction and refraction scintillation of pulsars are analyzed. Comparison between theory and the observational data shows that two types of spectra for electron density fluctuations 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 A is diffuse and it is distributed outside of the spiral arms of the Galaxy. Component BI is cloudy and associated with Galactic arms. Component BII is extremely nonuniform and associated with HII 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 the interstellar gas ionization and generation of turbulence are analyzed among other factors.

Keywords

Interstellar plasmaScintillationTurbulence
Type
Chapter Four Extreme Scattering Events, Distribution of Material and IPS
Information
International Astronomical Union Colloquium , Volume 182: Sources and Scintillations: Refraction and Scattering in Radio Astronomy , 2001 , pp. 163 - 169
Copyright
Copyright © Kluwer 2001

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