Origin of oxygen species in Titan's atmosphere

S. M. Hörst, Veronique Vuitton, Roger Yelle

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The detection of O+ precipitating into Titan's atmosphere by the Cassini Plasma Spectrometer (CAPS) represents the discovery of a previously unknown source of oxygen in Titan's atmosphere. The photochemical model presented here shows that those oxygen ions are incorporated into CO and CO2. We show that the observed abundances of CO, CO2 and H2O can be simultaneously reproduced using an oxygen flux consistent with the CAPS observations and an OH flux consistent with predicted production from micrometeorite ablation. It is therefore unnecessary to assume that the observed CO abundance is the remnant of a larger primordial CO abundance or to invoke outgassing of CO from Titan's interior as a source of CO.

Original languageEnglish (US)
Article numberE10006
JournalJournal of Geophysical Research: Space Physics
Volume113
Issue number10
DOIs
StatePublished - Oct 20 2008

Fingerprint

Titan atmosphere
Titan
Carbon Monoxide
Oxygen
oxygen
atmosphere
spectrometer
micrometeorites
spectrometers
micrometeorite
plasma
outgassing
oxygen ions
ablation
Spectrometers
Fluxes
Plasmas
ion
Degassing
Ablation

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Origin of oxygen species in Titan's atmosphere. / Hörst, S. M.; Vuitton, Veronique; Yelle, Roger.

In: Journal of Geophysical Research: Space Physics, Vol. 113, No. 10, E10006, 20.10.2008.

Research output: Contribution to journalArticle

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