2:15 PM - 2:30 PM
[PPS01-14] Exploring the dynamics of the Io plasma torus using a multi-dimensional physical chemistry model
Keywords:Jupiter, magnetosphere, Io plasma torus, magnetosphere-ionosphere coupling
Our results show that if a radially-dependent subcorotation profile is prescribed, consistent with observations [e.g., Brown, 1994; Thomas et al., 2001], then the model produces a radially-independent periodicity that is consistent with System IV. In addition, if volcanic events decrease the System IV period, as observed during the Cassini era (Steffl et al., 2006) and during the Hisaki era (Arakawa et al., 2017), then the model requires a modified subcorotion profile with the region near Io moving closer to rigid corotation. These observational/model results are contrary to the expectation of increased subcorotation for a more heavily mass loaded torus [Pontius and Hill, 1982]. In this talk we will discuss implications for MI coupling in the context of subcorotation, the System IV period, and superthermal electron abundance.