An emission mechanism for the Io-independent Jovian decameter radiation

Technical Report · Sat Jul 01 04:00:00 EDT 1978

OSTI ID:6080291

Goldstein, M L; Eviatar, A

A theory of the Io-independent decameter radiation is developed. The radiation results from excitation of the electromagnetic loss-cone instability by keV electrons, stably trapped near L = 6. The radiation is excited in Band 3 of the extraordinary mode. When the effects of refraction are estimated, it is shown that above 10 MHz radiation is beamed into the equatorial plane in a wide, but thin, conical sheet (Psi approximately equals 80 degrees). When the instability analysis is coupled with one of the octupole models of the Jovian magnetic field, the maximum convective growth of the instability occurs in the directions of the non-Io A, B, and C sources. The shape of the peak radio flux frequency spectrum is found to be a consequence of the loss cone shape of the electron distribution function.

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 6080291
• Report Number(s): N-78-31027
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FREQUENCY RANGE
INSTABILITY
INSTABILITY GROWTH RATES
JUPITER PLANET
KEV RANGE
LEPTONS
LOSS CONE INSTABILITY
MAGNETIC FIELDS
MHZ RANGE
MHZ RANGE 01-100
PLANETS
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RADIATIONS
RADIOWAVE RADIATION
SHORT WAVE RADIATION
SPECTRA