Detailed analysis of broadband electrostatic noise in the dayside auroral zone

Details Detailed analysis of broadband electrostatic noise in the dayside auroral zone Detailed analysis of broadband electrostatic noise in the dayside auroral zone

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.3565d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, March 1, 1991, p. 3565-3579. CNES-sponsored research.

Computer Science

Sound

38

Auroral Zones, Earth Magnetosphere, Electrostatic Waves, Ionospheric Noise, Satellite Sounding, Broadband, Cold Plasmas, Doppler Effect, Electron Beams, Field Aligned Currents, Power Spectra

Scientific paper

Results are presented on a statistical analysis of individual bursts of broadband electrostatic noise (BEN) in the dayside auroral region, using data from the V4H high-frequency waves experiment on Viking. It is shown that the angular distribution of BEN with respect to the earth's magnetic field is, most likely, isotropic, implying that BEN cannot consist of a unique linear plasma mode. Evidence is presented that BEN emissions are associated with hot electrons, field-aligned electron beams, ion conics, dc electric fields, and cold-plasma density gradients. The physical mechanisms which could induce the BEN are discussed.

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