Simulation of Na  D  emission near Europa during eclipse | Zendy

Cassidy T. A. | Zendy; Johnson R. E. | Zendy; Geissler P. E. | Zendy; Leblanc F. | Zendy

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Simulation of Na D emission near Europa during eclipse

Author(s) -

Cassidy T. A.,

Johnson R. E.,

Geissler P. E.,

Leblanc F.

Publication year - 2008

Publication title -

journal of geophysical research: planets

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.67

H-Index - 298

eISSN - 2156-2202

pISSN - 0148-0227

DOI - 10.1029/2007je002955

Subject(s) - eclipse , jupiter (rocket family) , atmosphere (unit) , physics , wavelength , astrobiology , astronomy , excited state , astrophysics , geology , meteorology , atomic physics , optics , space exploration

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 terrain.

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