Poster Presentation

Monitoring Io’s dynamical volcanic eruptions

Author(s): Wei-Ling Tseng (NTNU, Taiwan), Hui-Hui Chou (NCU, Taiwan), Sheng-Yuan Liu (ASIAA, Taiwan), Sean Hsu (University of Colorado at Boulder, USA), Hau-Yu, Baobab, Liu (ASIAA, Taiwan), Mark Gurwell (CfA, Harvard, USA), Ian-Lin Lai (NTNU, Taiwan)

Presenter: Wei-Ling Tseng (NTNU, Taiwan)

Io, Jupiter’s volcanically active moon, hosts a tenuous atmosphere that plays an
essential role in shaping the magnetospheric environment of Jupiter. Composed of mainly SO2, SO, with minor amounts of NaCl and KCl, Io’s atmosphere has been
previously characterized using SMA, ALMA, and other facilities (e.g., Moullet et al., 2010; de Pater et al., 2020), though with limited temporal coverage. Here we used SMA to monitor Io’s atmosphere with a moderate observation cadence (~ roughly weekly; 5 nights in 2022) to investigate the temporal variabilities and production mechanisms of its atmospheric gas species. With an advantage of SMA’s broad bandwidth, many SO2 lines can be detected simultaneously. Moreover, combining with the plasma measurements and auroral observations from, for example, the ongoing Juno mission at Jupiter and the Hisaki satellite, our SMA results are expected to provide synergistic values in helping to understand the Io-magnetosphere-ionosphere coupling at Jupiter.