Phosphine absorption in the 5-micron window of Jupiter

Details Phosphine absorption in the 5-micron window of Jupiter Phosphine absorption in the 5-micron window of Jupiter

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...40..189b&link_type=abstract

Icarus, vol. 40, Nov. 1979, p. 189-192.

Physics

Optics

5

Infrared Absorption, Infrared Astronomy, Infrared Windows, Jupiter Atmosphere, Molecular Absorption, Phosphines, Abundance, Atmospheric Composition, Atmospheric Optics, Infrared Spectra, Opacity

Scientific paper

Since the original suggestion by Gillett et al. (1969) it has generally been assumed that the region of partial transparency near 5 micron in Jupiter's atmosphere (the 5-micron window) is bounded by the nu4 NH3 at 6.1 micron and the nu3 CH4 band at 3.3 micron. New measurements of Jupiter and of laboratory phosphine (PH3) samples show that PH3 is a significant contributor to the continuum opacity in the window and in fact defines its short-wavelength limit. This has important implications for the use of 5-micron observations as a means to probe the deep atmospheric structure of Jupiter. The abundance of PH3 which results from a comparison of Jovian and laboratory spectra is about 3 to 5 cm-am. This is five to eight times less than that found by Larson et al. (1977) in the same spectral region, but is in good agreement with the result of Tokunaga et al. (1979) from 10-micron observations.

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