Rotationally driven quasi-periodic radio emissions in the Jovian magnetosphere

Details Rotationally driven quasi-periodic radio emissions in the Jovian magnetosphere Rotationally driven quasi-periodic radio emissions in the Jovian magnetosphere

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11104223m&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue A4, CiteID A04223

Physics

7

Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Magnetic Storms And Substorms (7954)

Scientific paper

The occurrence characteristics of Jovian multiple quasi-periodic (QP) bursts are investigated based on Galileo spacecraft observations. Multiple QP bursts recurrently appeared in a group with a planetary spin period of 10 hours. Their appearance was synchronized with the planetary rotation, i.e., they were preferably excited when Jupiter had a particular spin phase angle with respect to the Sun (at a subsolar longitude of System III around 260-320°). We also found that the burst groups were activated during magnetospheric disturbances probably caused by solar wind pressure variations. The rotationally driven polar disturbances accompanying quasi-periodic particle accelerations and radio wave bursts are discussed as being one of the daily unloading processes of planetary rotational energy.

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