Open AccessRotationally driven quasi‐periodic radio emissions in the Jovian magnetosphere
Author(s) -
Morioka A.,
Nozawa H.,
Misawa H.,
Tsuchiya F.,
Miyoshi Y.,
Kimura T.,
Kurth W.
Publication year - 2006
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2005ja011563
Subject(s) - jovian , magnetosphere , physics , geophysics , astrobiology , atmospheric sciences , astronomy , environmental science , plasma , saturn , planet , nuclear physics
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.