title: Energetic neutral atom emissions from Titan interaction with Saturn's magnetosphere.
abstract: The Cassini Magnetospheric Imaging Instrument (MIMI) observed the interaction of Saturn's largest moon, Titan, with Saturn's magnetosphere during two close flybys of Titan on 26 October and 13 December 2004. The MIMI Ion and Neutral Camera (INCA) continuously imaged the energetic neutral atoms (ENAs) generated by charge exchange reactions between the energetic, singly ionized trapped magnetospheric ions and the outer atmosphere, or exosphere, of Titan. The images reveal a halo of variable ENA emission about Titan's nearly collisionless outer atmosphere that fades at larger distances as the exospheric density decays exponentially. The altitude of the emissions varies, and they are not symmetrical about the moon, reflecting the complexity of the interactions between Titan's upper atmosphere and Saturn's space environment.
authors.affiliation: Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 21042, USA. don.mitchell@jhuapl.edu
authors.forename: D G
authors.initials: DG
authors.lastname: Mitchell
authors.forename: P C
authors.initials: PC
authors.lastname: Brandt
authors.forename: E C
authors.initials: EC
authors.lastname: Roelof
authors.forename: J
authors.initials: J
authors.lastname: Dandouras
authors.forename: S M
authors.initials: SM
authors.lastname: Krimigis
authors.forename: B H
authors.initials: BH
authors.lastname: Mauk
mesh_terms: D001272:Atmosphere; D005118:Extraterrestrial Environment; D007477:Ions; D008280:Magnetics; D018539:Saturn; D018531:Spacecraft
chemical_list: D007477:Ions