The source location of jovian millisecond ratio bursts with respect to Jupiter's magnetic field

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA093iA02p00979· OSTI ID:6051048

Genova, F ^[1]; Calvert, W ^[2]

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1. Observatoire de Paris (France)
2. Univ of Iowa, Iowa City (United States)

As in the previous study of the smooth Io-dependent radio emissions from Jupiter (the so-called L bursts or L emissions) by Genova and Aubier (1985), the location of the source of the jovian S bursts was studied by comparing the high frequency limit of these emissions, recorded in Nancay, France, to the surface gyrofrequency at the foot of the magnetic field lines which intersect Io's orbit, according to the O{sub 4} magnetic field model. For this purpose, the statistical occurrence of the S bursts was examined, both in central meridian longitude versus Io phase and as a function of the relative phase of Io with respect to Jupiter. The S bursts and the Io-dpeendent L emissions were found to originate from approximately the same locations at Jupiter, and probably under similar conditions of excitation by Io, although the beaming of these S emissions, which is indicated by the compactness of the occurrence patterns, was somewhat narrower than for the corresponding L emissions. Also, like the L emissions, an apparent delay of up to 70{degrees} (measured in the equatorial plane) was found to occur between the predicted instantaneous Io flux tube and the apparent source field line. The possible origin of this 70{degrees} delay is discussed.

• OSTI ID: 6051048
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 93:A2; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

660000* -- Physics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC RADIATION
EVALUATION
GEOMETRY
INTERPLANETARY SPACE
JUPITER PLANET
MAGNETIC FIELDS
MAGNETIC FLUX
MATHEMATICS
ORIGIN
PLANETS
RADIATIONS
RADIOWAVE RADIATION
SATELLITES
SCINTILLATIONS
SPACE