Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.5575s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, April 1, 1991, p. 5575-5590.
Astronomy and Astrophysics
Astronomy
8
Planetary Magnetic Fields, Planetary Radiation, Radio Waves, Uranus (Planet), Circular Polarization, Gyrofrequency, Magnetic Field Configurations, Radio Astronomy, Voyager 2 Spacecraft, Uranus, Radiowaves, Emissions, Polarization, Models, Power, Source, Pra Instrument, Voyager 2 Mission, Spacecraft Observations, Diagrams, Position (Location), Waves, Calculations, Parameters, Magnitude, Procedure, Trajectories, Timescale, Electrons, Latitude, Frequencies, Magnetic Field
Scientific paper
The total power and the degree of circular polarization as measured by the Planetary Radio Astronomy experiments on the Voyager spacecraft are modeled. For a source near the electron cyclotron frequency, the degree of circular polarization is determined by the angle between the wave vector and the field. It is shown that the observed strong circular polarization of Uranian smooth low-frequency (SLF) can be modeled as emission that is beamed along the direction of the magnetic field in a filled cone. The main observational constraints of SLF emission from Uranus are met by conjugate sources at about 21 deg from the magnetic equator.
Neal Kerry L.
Sawyer Brian C.
Warwick James W.
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