[P-PS01] Outer Solar System Exploration Today, and Tomorrow

[PPS01-07] How Jupiter's magnetosphere responds to Io's volcanic activity

★Invited Papers

*Kazuo Yoshioka¹, Fuminori Tsuchiya², Masato Kagitani², Tomoki Kimura⁴, Go Murakami³, Atsushi Yamazaki³, Ichiro Yoshikawa¹ (1.Graduate School of frontier Science, The University of Tokyo, 2.Tohoku University, 3.ISAS/JAXA, 4.Tokyo University of Science)

Keywords:Jupiter, Magnetosphere, Hisaki, Io plasma torus

The Io plasma torus (IPT), located in the Jovian inner magnetosphere (6-8 Jovian radii (RJ) from the planet), is filled with electrons and heavy ions such as sulfur and oxygen, a significant portion of which originates from the volcanoes on Io. The IPT is a crucial region connecting the primary plasma source (Io) with the middle and outer magnetosphere, where highly dynamic phenomena occur. Understanding the behavior of plasma in the IPT is essential for discussing the plasma dynamics in the whole Jovian magnetosphere.
A comprehensive understanding of the IPT can be achieved through spectral analysis of ion emissions generated by electron impact excitation. This method is called “Plasma diagnosis”. The emission lines from ions in the IPT are mainly in the extreme ultraviolet (EUV) region. Therefore, EUV spectroscopic data are important for studying Jupiter's inner magnetosphere.
Here we show the analysis of the spectroscopic data taken by the Hisaki satellite together with in-situ data taken by NASA's Juno spacecraft. Radial transports of plasmas and those dependencies on Io’s volcanic activity are discussed. The future perspectives for LAPYUTA mission will also be discussed.