Abstract
A spectrum of Jupiter between 6000 and 12 000 cm − at high resolution (0.05 cm −) was recorded with a Michelson interferometer at Palomar Mountain in October 1974. An analysis of the R branch of the 3 ν 3CH 4 band with the reflecting-layer model, taking into account the H 2 absorption which occurs in the same spectral range, leads to a Lorentzian half-width of 0.09 ± 0.02 cm −1, a rotational temperature of 175 ± 10° K, and a CH 4 abundance of order 52m atm. Five lines of the 13CH 43ν 3 band have been identified; a comparison with new laboratory spectra indicates that the 13CH 4/ 12CH 4 ratio in the Jupiter atmosphere is close to the terrestrial ratio.
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