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Radio images of Jupiter's synchrotron radiation at 6, 20, and 90 cmVLA observations of Jupiter's nonthermal radiation at wavelengths of 6, 20, and 90 cm are presented and compared. The spatial resolution in all images is 0.25 R(J) (R/J/ = Jovian radius). The brightness distribution of Jupiter is very similar at each of the three wavelengths, although the radiation peaks at 6 cm are at a slightly larger distance from Jupiter than those at the longer wavelengths. This is due to the higher rate of synchrotron radiation losses at the shorter wavelengths. Radial profiles through the images clearly show the presence of a 'shoulder' or flattening in the intensity at about 2.5 R(J) due to absorption effects by the satellite Amalthea. In addition, the so-called 'hot region' in Jupiter's radiation belts is clearly present at all three wavelengths: images of the planet at a cml (central meridian longitude) of about 30-40 deg show the radiation peak to the right of Jupiter to be much brighter than the peak at the left, while images at a cml of about 210-220 deg show the opposite. The difference in brightness between the two radiation peaks is similar at all three wavelengths.
Document ID
19910063105
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
De Pater, Imke
(California, University Berkeley, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1991
Publication Information
Publication: Astronomical Journal
Volume: 102
ISSN: 0004-6256
Subject Category
Lunar And Planetary Exploration
Accession Number
91A47728
Funding Number(s)
CONTRACT_GRANT: NSF AST-89-00156
CONTRACT_GRANT: NAGW-1805
Distribution Limits
Public
Copyright
Other

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