Atmospheres and Plasma Interactions at Saturn's Largest Inner Icy Satellites

Details Atmospheres and Plasma Interactions at Saturn's Largest Inner Icy Satellites Atmospheres and Plasma Interactions at Saturn's Largest Inner Icy Satellites

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...620l.115s&link_type=abstract

The Astrophysical Journal, Volume 620, Issue 2, pp. L115-L118.

Astronomy and Astrophysics

Astronomy

15

Planets And Satellites: Individual: Saturn

Scientific paper

We explore the possible existence of atmospheres on Saturn's icy satellites, Mimas, Enceladus, Tethys, Dione, and Rhea. Only the most massive satellite, Rhea, has the potential to hold a thin oxygen atmosphere/exosphere. The masses of the other satellites are too small to retain gravitationally atmospheres in the presence of large thermal escape rates. If the temperature of Rhea's atmosphere is close to its surface temperature, then a molecular oxygen column density of 6×1017 m-2 is possible and causes a discernable plasma interaction with Saturn's magnetosphere that can be probed by close flybys of the Cassini spacecraft.

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