Other
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9215177z&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Dec. 30, 1987, p. 15177-15187.
Other
20
Kilometric Waves, Nightglow, Planetary Magnetic Fields, Planetary Radiation, Radio Emission, Uranus (Planet), Low Frequencies, Magnetic Dipoles, Voyager 2 Spacecraft
Scientific paper
Taking advantage of the large range of magnetic latitudes explored by Voyager 2, due to the 60° tilt of the Uranian dipole field with respect to the rotation axis of the planet, the authors study the beaming pattern of the broadband kilometric radio emission detected over Uranus' nightside. Using the simple physical assumptions of an emission close to the local gyrofrequency and in a time-stationary average lobe, the authors constrain the radiation source to a high south magnetic latitude region (≡80°, or L ≡ 40) magnetically connected to the magnetospheric tail. They discuss the different source locations derived by other authors from different analyses. The authors determine then the beaming pattern of the main components (smooth and bursty) of the Uranian nightside radio emission and their variations with frequency. The results are compared with the present experimental and theoretical knowledge of planetary radio emission beaming.
Lecacheux Alain
Zarka Philippe
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