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

[PPS01-05] Understanding Jovian Aurora Using Observations from Space Telescope and the Juno Spacecraft

★Invited Papers

*Zhonghua Yao¹, Denis Grodent², Bertrand Bonfond², William Dunn³, Ruilong Guo⁴, Binzheng Zhang⁵ (1.Institute of Geology and Geophysics Chinese Academy of Sciences, 2.Laboratoire de Physique Atmosphérique et Planétaire, STAR institute, Université de Liège, 3.Mullard Space Science Laboratory, University College London, 4.Institute of Space Sciences, School of Space Science and Physics, Shandong University, 5.Department of Earth Sciences, The University of Hong Kong)

Keywords:Jupiter, Aurora, Magnetosphere

In the giant magnetospheres of Jupiter and Saturn, plasmas and energy could be received from external (i.e., solar wind) and internal (i.e., moons and rings) sources. The rapid rotation of the planet, combined with highly variable solar wind conditions, continually perturbs the magnetosphere. The extremely complex particle acceleration processes associated with these perturbations lead to energy dissipation in the magnetosphere and ionosphere. At the planet, auroral emissions are the signature of these processes and can be detected by Earth-based telescopes operating in multiple wavebands. Therefore, remote sensing of aurora provides a global view for us to understand the energy dissipation in the magnetosphere-ionosphere coupling dynamics, which strongly complements spacecraft in-situ measurements. During the Juno era, the Hubble Space Telescope and X-ray telescopes are regularly making simultaneous observations coordinated with Juno in situ measurements, in order to reveal the processes of particle acceleration and energy dissipation in the Jovian system. In this talk, we will review the recent progress on Jupiter’s auroral processes, including the drivers of main emissions, plasma injections, dawn storms and the polar cap emissions. The recent results demonstrate that Jupiter and the Earth probably have much more in common than we ever expected, urging comparative investigations between planetary auroras.