Physics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.1194m&link_type=abstract
Journal of Geophysical Research, vol. 85, Mar. 1, 1980, p. 1194-1202. Research supported by the Lockheed Independent Research P
Physics
2
Airglow, Atmospheric Radiation, Auroral Zones, Geomagnetic Micropulsations, Plasma Spectra, Antarctic Regions, Ion Cyclotron Radiation, Luminous Intensity, Nitrogen, Time Lag
Scientific paper
The paper presents correlations between the amplitude envelope of Pc pulsations and zenith 4278-A N2(+) intensity observed at Siple Station, Antarctica. The frequency time spectrogram of the ULF data does not show the increasing dispersion associated with bouncing waves, so that the Pc pulsation event is a periodic hydromagnetic emission. Analysis of the time delay between the particle-induced optical emission and the waves using the ion cyclotron resonance theory shows that the delay is consistent with the resonance of Pc 1 and MeV protons near the northern conjugate of the Siple line. It is concluded that the intensity of the measured light is higher than that which can be expected from precipitation of ions of normally observed densities.
Armstrong W. C.
Arnoldy Roger L.
Cahill Laurence J. Jr.
Doolittle J. H.
Fraser-Smith Antony C.
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