Atomic Carbon in the Upper Atmosphere of Titan

Details Atomic Carbon in the Upper Atmosphere of Titan Atomic Carbon in the Upper Atmosphere of Titan

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...708l..18z&link_type=abstract

The Astrophysical Journal Letters, Volume 708, Issue 1, pp. L18-L21 (2010).

Astronomy and Astrophysics

Astronomy

3

Planets And Satellites: Individual: Titan, Radiative Transfer, Scattering

Scientific paper

The atomic carbon emission C I line feature at 1657 Å (3 P 0 J -3 PJ ) in the upper atmosphere of Titan is first identified from the airglow spectra obtained by the Cassini Ultra-violet Imaging Spectrograph. A one-dimensional photochemical model of Titan is used to study the photochemistry of atomic carbon on Titan. Reaction between CH and atomic hydrogen is the major source of atomic carbon, and reactions with hydrocarbons (C2H2 and C2H4) are the most important loss processes. Resonance scattering of sunlight by atomic carbon is the dominant emission mechanism. The emission intensity calculations based on model results show good agreement with the observations.

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