[PPS01-P04] Enhancement of the Jovian thermospheric temperature above the Great Red Spot based on the infrared spectroscopic data obtained with IRTF/iSHELL
Keywords:Jupiter, Great red spot, Thermosphere
In this study, we carried out the thermosphere temperature observation in the Jovian mid-latitude region near the Great red spot by IRTF/iSHELL on January 11, 2017. This observation was performed with the iSHELL's Lp1-mode (3.265-3.657um), and the data reduction was performed with NASA's data reduction tool Spextool ver. 5.0.1. Similar to the past study by O'Donoghue et al. , we adopted the intensity ratio of two emission lines of H3+ (3.3839um/3.4548um), and estimated the temperature precisely distinguished from CH4 line by iSHELL’s higher wavelength resolution (R~75000). As a result, we estimated the thermospheric temperature above the Great red spot to be 910±132K, and that in the surrounding region to be 583±30K, showing about 300K increase on Great red spot. The estimated temperature was lower than that in O’Donoghue et al. , there is possibility that the thermosphere temperature varies in time. However, we confirmed the temperature above Great red spot is higher than that in the surrounding region. This suggests the existence of energy transport from the lower to the upper atmosphere in the Great red spot. In the presentation, we report the result of carefully reduction.