Generation of low-frequency magnetic noise on auroral field lines

Details Generation of low-frequency magnetic noise on auroral field lines Generation of low-frequency magnetic noise on auroral field lines

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3325l&link_type=abstract

Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3325-3328.

Physics

2

Atmospherics, Auroras, Electromagnetic Noise, Magnetohydrodynamic Stability, Collisionless Plasmas, Electron Energy, Field Aligned Currents, Low Frequencies, Whistlers

Scientific paper

A mechanism for the generation of a low-frequency (1-562 Hz) magnetic noise, occurring on the auroral field lines is proposed in terms of an electromagnetic lower hybrid instability. The instability can be driven either by electron temperature anisotropies or by field-aligned currents. Several observed properties of the noise, such as (1) its occurrence from the same region where broadband electric field noise is observed, (2) its frequency range, (3) its tentative identification as a whistler type mode, and (4) its burstlike nature, can be explained by the theory.

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