Simulation of Na D emission near Europa during eclipse
- Cassidy, T. A.
- Johnson, R. E. E.
- Geissler, P. E.
- Leblanc, François
DOIAbstract
The Cassini imaging science subsystem observed Europa in eclipse during Cassini's Jupiter flyby. The disk-resolved observations revealed a spatially nonuniform emission in the wavelength range of 200–1050 nm (clear filters). By building on observations and simulations of Europa's Na atmosphere and torus we find that electron-excited Na in Europa's tenuous atmosphere can account for the observed emission if the Na is ejected preferentially from Europa's dark terrai
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