Michael Mendillo, Makenzie Lystrup, Tom Stallard, Luke Moore, Nick Achilleos, Takeshi Oka
Abstract
We propose to use Michelle in high resolution echelle mode to look for the spectrum of the hydronium ion H3O+ in the upper atmosphere of Saturn. If observed, it would be the first time that the infrared spectrum of this ion has been detected outside of the laboratory. H3O+ will provide crucial information about the coupling of magnetospheric plasma - derived from the rings and icy moons - to the upper atmosphere, and provide planetary scientists with a key probe for investigating the energetics and dynamics of giant planet atmospheres. This proposal supports the current NASA/ESA Cassini Mission.