The C/H and C-12H4/C-13H4 ratios in the atmospheres of Jupiter and Saturn from 0.1-inverse-cm resolution near-infrared spectra

Details The C/H and C-12H4/C-13H4 ratios in the atmospheres of Jupiter and Saturn from 0.1-inverse-cm resolution near-infrared spectra The C/H and C-12H4/C-13H4 ratios in the atmospheres of Jupiter and Saturn from 0.1-inverse-cm resolution near-infrared spectra

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....53...29l&link_type=abstract

Astronomy and Astrophysics, vol. 53, no. 1, Nov. 1976, p. 29-33.

Astronomy and Astrophysics

Astrophysics

16

Hydrogen, Infrared Spectra, Jupiter Atmosphere, Methane, Planetary Atmospheres, Saturn (Planet), Abundance, Astronomical Spectroscopy, Mass Ratios, Molecular Spectra, Near Infrared Radiation

Scientific paper

Results are presented for analyses of the region of the 3 nu-3 CH4 band in spectra of Jupiter and Saturn covering the wave-number range from 6000 to 12,000 kaysers. The spectra were obtained with a resolution of 0.1 kayser along the central meridians of the planets using a Connes interferometer and are analyzed on the assumption that the reflecting layer hypothesis is appropriate at the disk center. Calibration of the spectra is described in detail, and it is shown that the CH4 and H2 absorptions have been correctly separated. Measurements of the CH4 and H2 abundances at the same wavelength yield C/H ratios of approximately 0.0046 and 0.0047 for the atmospheres of Jupiter and Saturn, respectively; these values are of the same order of magnitude as the solar ratio. The (C-12)H4/(C-13)H4 ratio is tentatively estimated to be about 70 for Jupiter and about 55 for Saturn.

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