Magnetoacoustic instability and termination of solar wind

Details Magnetoacoustic instability and termination of solar wind Magnetoacoustic instability and termination of solar wind

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...192..757b&link_type=abstract

Astrophysical Journal, vol. 192, Sept. 15, 1974, pt. 1, p. 757-767.

Astronomy and Astrophysics

Astrophysics

1

Interstellar Gas, Magnetoacoustic Waves, Magnetohydrodynamic Stability, Plasma Interactions, Solar Wind, Collisionless Plasmas, Interplanetary Gas, Magnetic Fields, Plasma Turbulence, Solar Protons

Scientific paper

Stability of a system composed of two interstreaming plasmas in the presence of a transverse magnetic field is investigated, and the theory is applied to solar-wind interaction with interplanetary gas. The system is susceptible to magnetoacoustic instability provided the ratio of densities of solar-wind protons to interplanetary protons is below a critical value. The turbulence produced by this instability will reduce the solar-wind speeds to subsonic values. This transition for the solar wind occurs at heliocentric distances between 5 and 20 AU.

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