Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93..370d&link_type=abstract
Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 370-381.
Astronomy and Astrophysics
Astrophysics
20
Astronomical Maps, Jupiter (Planet), Planetary Radiation, Polarized Radiation, Radiation Belts, Flux Density, Limb Darkening, Linear Polarization, Magnetic Dipoles, Opacity, Planetary Magnetic Fields, Planetary Mapping, Planetary Rotation, Planetary Temperature, Polarization Characteristics, Thermal Radiation
Scientific paper
Two-dimensional maps of Jupiter's radio emission were made in April 1978 at a frequency of 4885 MHz (6 cm) using the Westerbork telescope in the Netherlands. Pictures in the Stokes parameters I, Q and U have been obtained every 15 deg in longitude, each smeared over 20 deg of the planet's rotation. The half power beam width was approximately 1/6 of the disk diameter in right ascension and approximately 1/2 in declination. The planetary disk shows little or no limb darkening at this wavelength and has a temperature of 220 + or - 8 K. The radiation belts clearly show a kind of plateau or flattening in intensity in the outer part of the belt. A comparison with 21 and 50 cm maps indicate no difference in the width and form of the emission regions with wavelength.
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