Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

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

Sun. May 22, 2016 1:45 PM - 3:05 PM A02 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Jun Kimura(Earth-Life Science Institute, Tokyo Institute of Technology), Masaki Fujimoto(Institite of Space and Astronautical Science, Japan Aerospace Exploration Agency), Yasumasa Kasaba(Dep. Geophysics Graduate School of Science Tohoku University), Sho Sasaki(Department of Earth and Space Sciences, School of Science, Osaka University), Takayuki Tanigawa(School of Medicine, University of Occupational and Environmental Health), Yasuhito Sekine(Department of Earth and Planetary Science, University of Tokyo), Kunio Sayanagi(Atmospheric and Planetary Sciences Department, Hampton University), Steven Vance(Jet Propulsion Laboratory, Caltech), Chair:Hiroaki Misawa(Planetary Plasma and Atmospheric Research Center, Graduate School of Science, Tohoku University), Kazuo Yoshioka(Department of Earth & Planetary Science, Graduate School of Science, The University of Tokyo)

2:20 PM - 2:35 PM

[PPS01-14] Jupiter's auroral observations by Hisaki/EXCEED and expectation toward collaborations with Juno

*Chihiro Tao1, Tomoki Kimura2, Go Murakami3, Kazuo Yoshioka4, Fuminori Tsuchiya5, Hajime Kita5, Nicolas André6, Sarah Badman7, Michel Blanc6, Ichiro Yoshikawa4, Atsushi Yamazaki3, Daikou Shiota8, Hiroyasu Tadokoro9, Yasumasa Kasaba5, Masaki Fujimoto3 (1.National Institute of Information and Communications Technology, 2.RIKEN, 3.ISAS/JAXA, 4.Tokyo University, 5.Tohoku University, 6.IRAP, 7.Lancaster University, 8.Nagoya University, 9.Musashino University)

Keywords:Jupiter, Aurora, EXCEED/Hisaki

Ultraviolet (UV) emissions from atmospheric H2 and H reflect powerful polar energetics at outer planets. UV spectra provides information related with the precipitating auroral electron energy. Auroral electron energy and flux relationship shows variety among Jupiter’s auroral regions. The spectrometer EXCEED onboard JAXA’s Earth-orbiting planetary telescope Hisaki monitors extreme UV emissions from Jovian aurora and Io plasma torus continuously. Hisaki succeeded to detect sporadic, large auroral power enhancements lasting both short- (<1 planetary rotation) and long-term (>a few rotations) variations and their modulations by an Io’s volcanic activity over several weeks. The spectral information taken by Hisaki enables us to investigate (1) the time variation of the auroral electron during these emission enhancements, (2) statistical survey for occurrence of polar-dominant events, and (3) associated magnetospheric dynamics for these emission enhancement events using the Knight’s aurora acceleration theory. Expecting collaborative observation with Juno will be discussed.