Observation results of Jupiter's extended sodium nebula in 2013-2014

Abstract:

Jupiter's sodium nebula whose origin is Io's volcanic gas shows variations in its brightness due to the volcanic activity on Io. Imaging observation of D-line brightness in the sodium nebula was performed in 2013 through 2014 using a 10-cm reflector at Haleakala High Altitude Observatory in Maui island, Hawaii. Although the D-line brightness of the sodium nebula had been generally stable and relatively dark it showed an enhancement at the end of March 2014. It can be expected that plasma supply into Jupiter's magnetosphere from Io increased around this period. In 2013 through 2014, several observations of phenomena around Jupiter seem to have been made to support the HISAKI mission. To contribute to this international campaign, we will show our observation results in the presentation.