Laboratory studies, analysis, and interpretation of the spectra of hydrocarbons present in planetary atmospheres including cyanoacetylene, acetylene, propane, and ethane

Details Laboratory studies, analysis, and interpretation of the spectra of hydrocarbons present in planetary atmospheres including cyanoacetylene, acetylene, propane, and ethane Laboratory studies, analysis, and interpretation of the spectra of hydrocarbons present in planetary atmospheres including cyanoacetylene, acetylene, propane, and ethane

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3077...54b&link_type=abstract

In NASA, Goddard Space Flight Center, First International Conference on Laboratory Research for Planetary Atmospheres p 54-63 (S

Astronomy and Astrophysics

Astrophysics

Acetylene, Atmospheric Composition, Cyanoacetylene, Ethane, Mathematical Models, Methane, Photochemical Reactions, Planetary Atmospheres, Propane, Satellite Observation, Astrophysics, Cassini Mission, Fourier Transformation, High Resolution, Infrared Radiation, Spectrometers, Temperature Measurement, Titan

Scientific paper

Combining broadband Fourier transform spectrometers (FTS) from the McMath facility at NSO and from NRC in Ottawa and narrow band TDL data from the laboratories with computational physics techniques has produced a broad range of results for the study of planetary atmospheres. Motivation for the effort flows from the Voyager/IRIS observations and the needs of Voyager analysis for laboratory results. In addition, anticipation of the Cassini mission adds incentive to pursue studies of observed and potentially observable constituents of planetary atmospheres. Current studies include cyanoacetylene, acetylene, propane, and ethane. Particular attention is devoted to cyanoacetylen (H3CN) which is observed in the atmosphere of Titan. The results of a high resolution infrared laboratory study of the line positions of the 663, 449, and 22.5/cm fundamental bands are presented. Line position, reproducible to better than 5 MHz for the first two bands, are available for infrared astrophysical searches. Intensity and broadening studies are in progress. Acetylene is a nearly ubiquitous atmospheric constituent of the outer planets and Titan due to the nature of methane photochemistry. Results of ambient temperature absolute intensity measurements are presented for the fundamental and two two-quantum hot-band in the 730/cm region. Low temperature hot-band intensity and linewidth measurements are planned.

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