Periodic amplitude variations in Jovian continuum radiation

Technical Report · Mon Dec 01 00:00:00 EST 1986

OSTI ID:6597331

Kurth, W S; Gurnett, D A; Scarf, F L

An analysis of periodic variations in the amplitude of continuum radiation near 3 kHz trapped in the Jovian magnetosphere shows structure with periods near both 5 and 10 hours. Contrary to a plausible initial idea, the continuum amplitudes are not organized by the position of the observer relative to the dense plasma sheet. Instead, there seem to be preferred orientations of system III longitude with respect to the direction to the sun which account for the peaks. This implies a clock-like modulation of the continuum radiation intensity as opposed to a searchlight effect. The importance of the dipole longitude solar-wind alignment to the amplitude of the continuum radiation implies that the source region of the radiation is near the magnetopause and may indirectly tie the generation of the radio waves to the clock-like modulation of energetic electron fluxes from Jupiter.

• Research Organization: Iowa Univ., Iowa City (USA). Dept. of Physics and Astronomy
• OSTI ID: 6597331
• Report Number(s): AD-A-176669/0/XAB
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
JUPITER PLANET
PLANETARY MAGNETOSPHERES
LONG WAVE RADIATION
AMPLITUDES
SOLAR WIND
DIPOLES
MODULATION
ATMOSPHERES
ELECTROMAGNETIC RADIATION
MULTIPOLES
PLANETARY ATMOSPHERES
PLANETS
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
640107* - Astrophysics & Cosmology- Planetary Phenomena