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Natural radio lasing at JupiterLike the comparable AKR radio emissions from earth's magnetosphere, the well-known decametric radio S-bursts from Jupiter, observed in France and Australia at frequencies from 10 to 26 MHz, have been found to exhibit equally spaced discrete spectral components which can be attributed to the adjacent longitudinal oscillation modes of natural radio lasers. Implying sizes of only a few kilometers for the individual radio lasers producing the S-bursts, the frequency spacing of these modes was roughly constant with frequency and about 30 to 50 kHz. Their corresponding temporal spacings, however, varied inversely proportional to the observing frequency, suggesting that the radio lasers producing the S-bursts were expanding uniformly at a rate of about 4 km/s. Presumably caused by the projected motion of Io with respect to the planet, this expansion of the S-burst radio lasers would account for the downward frequency drifts of the S-bursts without the energetic electron bunches which have heretofore always been assumed necessary to account for such behavior.
Document ID
19890033018
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Calvert, W.
(Iowa, University Iowa City, United States)
Leblanc, Y.
(Paris Observatoire, Meudon, France)
Ellis, G. R. A.
(Tasmania, University Hobart, Australia)
Date Acquired
August 14, 2013
Publication Date
December 15, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 335
ISSN: 0004-637X
Subject Category
Lunar And Planetary Exploration
Accession Number
89A20389
Funding Number(s)
CONTRACT_GRANT: NAGW-1206
CONTRACT_GRANT: NGL-16-001-043
CONTRACT_GRANT: NAGW-2562
Distribution Limits
Public
Copyright
Other

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