Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..342h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 1, 1986, p. 342-361.
Astronomy and Astrophysics
Astrophysics
52
Electron Density Profiles, Interstellar Matter, Magnetohydrodynamic Turbulence, Space Density, Anisotropy, Incompressible Flow, Pulsars, Space Plasmas
Scientific paper
A model of anisotropic plasma fluids is developed to examine the origin of the spectra of random, electron-density variations inferred by Armstrong, Cordes, and Rickett from measurements of pulsar radio signals. These electron variations are interpreted as density components of an anisotropic stationary mode of nonlinear magnetogasdynamics-tangetial pressure balances. It is demonstrated that turbulent flows, generated by the disruption of H I clouds in O star H II regions, reproduce well the mean electron spectrum inferred by Armstrong et al., if the relative rms density variation, >(n-n0)2<1/2/n0 is 0.125, where n0 is the mean density.
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