The correlation of AKR waves with precipitating electrons as determined by plasma wave and X-ray image data from the POLAR spacecraft

Autor:	W. L. Imhof, J. Mobilia, D. L. Chenette, M. Walt, D. W. Datlowe, Roger R. Anderson
Rok vydání:	1998
Předmět:	Physics Geophysics Waves in plasmas Astrophysics::High Energy Astrophysical Phenomena Electric field Bremsstrahlung General Earth and Planetary Sciences Electron precipitation Pixie Magnetosphere Auroral kilometric radiation Electron Atomic physics
Zdroj:	Geophysical Research Letters. 25:289-292
ISSN:	0094-8276
DOI:	10.1029/97gl03770
Popis:	Simultaneous measurements are presented of the intensities of AKR waves in the 60 kHz to 800 kHz range and the local time distributions of the fluxes of electrons precipitating into the atmosphere using wave and bremsstrahlung x-ray data acquired on the POLAR spacecraft. The images of 2 to 12 keV x-ray emission measured with the PIXIE spectrometer were used to obtain the positions and intensities of the electron precipitation regions. Electric field wave measurements of the AKR were obtained with the Plasma Wave Instrument (PWI). Data are presented from a satellite pass on 19 April 1996 in which there were several short term enhancements in the intensities of both waves and x-rays. The AKR electric field strengths were correlated with x-rays emitted over a six hour local time range in the pre-midnight sector with a correlation coefficient of 0.51. At the times of some of the rapid increases in the x-ray fluxes the AKR intensities exhibited similar sharp onsets.
Databáze:	OpenAIRE
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