On the nature of the irregularities in the interstellar medium

Details On the nature of the irregularities in the interstellar medium On the nature of the irregularities in the interstellar medium

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pazh....6..574c&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 6, Sept.-Oct. 1980, p. 574-578.) Soviet Astronomy Letters, vol. 6, Sept.-Oct. 1980, p.

Astronomy and Astrophysics

Astronomy

3

Cosmic Plasma, Interstellar Space, Magnetohydrodynamic Waves, Plasma-Electromagnetic Interaction, Cyclotron Frequency, Density Distribution, Energy Dissipation, Landau Damping, Magnetoacoustic Waves, Particle Density (Concentration), Particle Interactions, Plasma Frequencies, Pulsars, Scale Models, Space Density, Velocity Distribution

Scientific paper

Observational evidence from pulsar radio scintillations suggests a qualitative interpretation of the spectrum of irregularities in the interstellar medium. The coarse-scale (around 10 to the 13th cm) irregularities cannot result from the propagation of waves through the interstellar plasma, but the fine-scale (around 10 to the 10th cm) structure might be attributable to Alfven and magnetoacoustic waves. The characteristic scales of irregularity agree with the scales of the dissipative processes: the mean free path for the coarse irregularities and the Landau-damping scale for the fine structure.

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