Coupling between Alfven and slow magnetosonic waves in an inhomogeneous finite-beta plasma. I - Coupled equations and physical mechanism. II - Eigenmode analysis of localized ballooning-interchange instability

Details Coupling between Alfven and slow magnetosonic waves in an inhomogeneous finite-beta plasma. I - Coupled equations and physical mechanism. II - Eigenmode analysis of localized ballooning-interchange instability Coupling between Alfven and slow magnetosonic waves in an inhomogeneous finite-beta plasma. I - Coupled equations and physical mechanism. II - Eigenmode analysis of localized ballooning-interchange instability

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37..567o&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, May 1989, p. 567-577, 579-588.

Computer Science

25

Coupling Coefficients, Magnetoacoustic Waves, Magnetohydrodynamic Waves, Nonuniform Plasmas, Ring Currents, Space Plasmas, Compression Waves, Extremely Low Radio Frequencies, Larmor Radius, Pressure Gradients

Scientific paper

A system of ordinary differential equations describing the coupling between the Alfven and slow modes has been obtained for standing oscillations along a magnetic field line in the two-fluid approximation. Special attention is given to the combined effect of the pressure gradient and the field-line curvature. In the second part, a numerical eigenmode analysis along a model field line has been performed in order to explore the ballooning-interchange instability of guided hydromagnetic waves. The results support ballooning-interchange instability as the excitation mechanism of the storm-time Pc5 pulsation.

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