The vibrational overtone spectrum of liquid methane in the visible and near infrared - Applications to planetary studies

Details The vibrational overtone spectrum of liquid methane in the visible and near infrared - Applications to planetary studies The vibrational overtone spectrum of liquid methane in the visible and near infrared - Applications to planetary studies

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...35..400r&link_type=abstract

Icarus, vol. 35, Sept. 1978, p. 400-409.

Astronomy and Astrophysics

Astronomy

12

Absorption Spectra, Astronomical Spectroscopy, Infrared Spectra, Liquefied Gases, Methane, Planetary Radiation, Vibrational Spectra, Infrared Absorption, Line Shape, Refractivity, Spectral Bands, Earth Based Observations, Spectral Bands, Methane, Light (Visible Radiation), Spectrum, Absorption Spectra, Spectrophotometry, Infrared, Wavelengths, Temperatures, Liquids, Gases

Scientific paper

The strengths of 10 bands in the absorption spectrum of liquid methane between 19,400 and 6190 A have been measured. After a small correction for the polarizability of the liquid is applied for the purpose of comparison with similar gas-phase measurements, it is found that there is no temperature dependence of the band strengths between 95 and 295 K. Changes of band shape with temperature cause the 95 K laboratory spectra to resemble Saturn more than room-temperature observations do. Gas-phase absorption clearly dominates the liquid in planetary spectra, so liquid methane cannot be detected in the outer solar system by earth-based observations.

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