The Enceladus and OH Tori at Saturn | Zendy

R. E. Johnson | Zendy; H. T. Smith | Zendy; O. J. Tucker | Zendy; M. Liu | Zendy; M. Bürger | Zendy; E. C. Sittler | Zendy; R. L. Tokar | Zendy

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The Enceladus and OH Tori at Saturn

Author(s) -

R. E. Johnson,

H. T. Smith,

O. J. Tucker,

M. Liu,

M. Bürger,

E. C. Sittler,

R. L. Tokar

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505750

Subject(s) - enceladus , physics , saturn , torus , astrobiology , astronomy , titan (rocket family) , atmosphere (unit) , natural satellite , astrophysics , satellite , planet , meteorology , geometry , mathematics

The remarkable observation that Enceladus, a small icy satellite of Saturn, is actively venting has led to the suggestion that ejected water molecules are the source of the toroidal atmosphere observed at Saturn for over a decade using the Hubble Space Telescope(HST). Here we show that the venting leads directly to a new feature, a narrow Enceladus neutral torus. The larger torus, observed using HST, is populated by charge exchange, the process that limits the lifetime of the neutrals in the Enceladus torus. Subject heading: planets and satellites: individual (Enceladus, Saturn)

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