Analysis of smooth high-frequency emission at Neptune

Details Analysis of smooth high-frequency emission at Neptune Analysis of smooth high-frequency emission at Neptune

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.5567m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. A4, p. 5567-5578

Astronomy and Astrophysics

Astronomy

2

Magnetic Fields, Neptune (Planet), Polarization, Position (Location), Radio Astronomy, Radio Emission, Stellar Models, Variations, Antennas, Gyrofrequency, Planetary Magnetospheres, Radiant Flux Density, Time Dependence, Voyager 2 Spacecraft

Scientific paper

We present a detailed study of the highest-frequency component of smooth radio emission observed during the Voyager 2 encounter with Neptune in August 1989. This emission occurs during three distinct periods on August 24 and 25, 1989, in the frequency range of 550 to 900 kHz. By assuming straight-line propagation from sources of both fundamental and second harmonic gyroemission, we perform a detailed analysis of the observed polarization of the emission. The data are most consistent with an L-O mode source in the north magnetic polar region, around 50 deg W, 50 deg N. A second possible source is in the north magnetic polar region, around 270 deg W, 50 deg N. This source must emit in the R-X mode.

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