LOW TEMPERATURE MEASUREMENTS OF PLANETARY GASES
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Date
1987
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Publisher
Ohio State University
Abstract
A low temperature absorption cell has been used to obtain spectra between 100 and 300 Kelvin of planetary gases. These spectra were recorded with our Doppler-limited diode laser spectrometer and with the 1-m FTS located at the McMath Solar Telescope at the National Solar Observatory, operated at $0.0025 cm^{-1}$ resolution. We undertook an investigation of the spectrum of ethane, propane, and ethylene under $H_{2}$-broadened conditions at temperatures appropriate to the outer planets. A modified confocal etalon facilitated precise measurement of line positions. We will discuss these experiments, the basic results, and the implications for planetary modeling.
Description
Author Institution: Laboratory for Extraterrestrial Physics, NASA/Goddard Space Flight Center