Determination of the ammonia content of the Jovian atmosphere

Details Determination of the ammonia content of the Jovian atmosphere Determination of the ammonia content of the Jovian atmosphere

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975azh....52..895i&link_type=abstract

Astronomicheskii Zhurnal, vol. 52, July-Aug. 1975, p. 895-898. In Russian.

Astronomy and Astrophysics

Astronomy

Ammonia, Atmospheric Composition, Jupiter Atmosphere, Spectral Line Width, Absorption Spectra, Abundance, Bandwidth, Fine Structure, Molecular Spectra

Scientific paper

The fine structure of the ammonia absorption band at 6450 A is examined on the basis of grating spectrograms taken with a dispersion of 6 A/mm and with the spectrograph slit oriented along the central meridian and the equator of Jupiter. The equivalent widths and half-widths are determined for 20 lines of the band. The ammonia content of the Jovian atmosphere is estimated at 17 plus or minus 4 m-atm from comparison of these data with laboratory data. A comparison of Jovian and lunar spectra taken under the same conditions shows significant changes in certain lines of the ammonia absorption band at 6450 A. The pressure at the energy level of line formation are estimated from the line half-widths of the NH3 6450 A band.

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