Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9923541l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A12, p. 23,541-23,546
Physics
3
Correlation, Geomagnetic Tail, Low Frequencies, Plasma Waves, Radio Auroras, Radio Bursts, Spectral Energy Distribution, Earth Magnetosphere, Galileo Spacecraft, Geomagnetism
Scientific paper
Data from the Galileo plasma wave system recorded during an investigation of the Earth magnetotail on December 8, 1990, are analyzed in both the myriametric and the kilometric wavelength range. In the far tail, between 80 and 30 Earth radii, two components are observed in the myriametric range (frequencies between 6 and about 30 kHz): (1) the 'classical' trapped continuum radiation with a smoothly varying intensity in time and (2), superposed on this component, bursts of waves with typical spectral densities of 10(exp -15) V(exp 2)/sq m.Hz. These bursts of myriameteric waves are shown B to correlate with bursts of intense auroral kilometric radiation (AKR) with typical spectral density of 10(exp -12) V(exp 2)/sq m/Hz. This bursty myriametric radiation is the analog of the low frequency radiation (LFR) reported by Filbert and Kellog (1989). Its close correlation with the kilometric radiation suggests the existence of a direct relationship between these two radiations. A generation mechanism that explains this correlation and the frequency gap between the AKR and the LFR is proposed.
de Villedary C.
Gurnett Donald A.
Hilgers Alain
Kurth Willaim S.
Louran Philippe
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