High-resolution 3 micron spectroscopy of molecules in the mesosphere and troposphere of titan

T. R. Geballe, S. J. Kim, K. S. Noll, C. A. Griffith

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

A high-resolution 2.9-3.5 μm spectrum of Titan has revealed a surprisingly strong emission band of hydrogen cyanide (HCN) and strong absorption bands of acetylene (C2H2) and monodeuterated methane (CH3D), in addition to methane (CH4) emission and absorption known from previous observations. Whereas the C2H 2 and CH3D absorptions are largely in the troposphere, the HCN emission must occur at higher altitudes. However, the intensity of the HCN band is inconsistent with our current understanding of the upper atmosphere of Titan.

Original languageEnglish (US)
Pages (from-to)L39-L42
JournalAstrophysical Journal
Volume583
Issue number1 II
DOIs
StatePublished - Jan 20 2003

Keywords

  • Astrochemistry
  • Infrared: solar system
  • Line: identification
  • Molecular processes
  • Planets and satellites: individual (Titan)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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