Abstract:
Aurorae are important phenomena which reflect the environment and dynamics of the planetary system. 
JAXA's Earth-orbiting planetary space telescope Hisaki has been revealing the time variations and 
occurrence of auroral power comprehensively in the first time. In order to clarify the cause of 
auroral variations and Jupiterfs rotation-dominated magnetospheric dynamics, this study focused on
 the energy (= acceleration electric potential) and flux (= current density) relation. Comparing with
 spatially-resolved auroral images and spectra taken by Hubble Space Telescopes, Jupiter's auroral
 parameters and the relation are estimated from Hisaki/EXCEED observations. Enhancements of auroral
 power accompany increases of the electron number flux rather than the electron energy variations,
 which is associated with the current enhancements in the magnetosphere. Possible scenarios are (i)
 an adiabatic variation of the magnetospheric plasma under a magnetospheric compression and/or plasma
 injection, and (ii) a change of the dominant auroral region.