Methane absorption near 680 NM in the spectra of Jupiter and Saturn. II - Quantitative interpretation

Details Methane absorption near 680 NM in the spectra of Jupiter and Saturn. II - Quantitative interpretation Methane absorption near 680 NM in the spectra of Jupiter and Saturn. II - Quantitative interpretation

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990kfnt....6...53a&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 6, May-June 1990, p. 53-60. In Russian.

Astronomy and Astrophysics

Astronomy

Absorption Spectra, Jupiter (Planet), Methane, Saturn (Planet), Visible Spectrum, Astronomical Photometry, Physical Properties, Planetary Atmospheres, Radiation Pressure

Scientific paper

The intensities and halfwidths of the 681.46, 681.60, and 681.88 nm methane lines in the spectra of Jupiter and Saturn are redetermined. The physical parameters are estimated using a two-layer model of the planets' atmospheres. It is suggested that the absorption lines are formed both in the cloudy gas-aerosol and optically thin pure gaseous overcloud layers. For Saturn the mean value of pressure at the effective levels of methane absorption line formation are found to be (1.6 + or - 0.2) x 10 to the 5th Pa for the center of the disk and 91.5 + or - 0.2) x 10 to the 5th Pa at a distance 0.7 of the radius from the center. For Jupiter, the mean pressure at the level of 681.88 nm methane absorption line is (2.0 + or - 0.2) x 10 to the 5th Pa. It is shown that the volume concentration of gaseous methane molecules for Saturn is dependent on temperature and is in the range (16.0 + or - 0.2) x 10 to the 16th/cu cm. For Jupiter, the volume concentration of gaseous methane molecules is in the range (5.8 - 6.1) x 10 to the 16th/cu cm.

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