The mean Jovian temperature structure derived from spectral observations from 105 to 630 CM kaysers

Astronomy and Astrophysics – Astronomy

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Infrared Astronomy, Jupiter (Planet), Molecular Spectroscopy, Planetary Temperature, Abundance, Far Infrared Radiation, Helium, Hydrogen, Jupiter Atmosphere, Molecular Rotation, Temperature Inversions

Scientific paper

Far infrared observations of the thermal emission of Jupiter are used to determine the temperature at 1 bar. High-altitude observations of the whole-disk brightness temperature of Jupiter in the range of 100 to 347 kaysers were inverted to obtain a P-T profile between 1.5 and 0.06 atm, assuming as opacity sources the H2 collisionally induced continuum and the rotation inversion bands of ammonia. The P-T profile derived from the spectrum reproduces the main features of the observed spectrum, with a slightly improved fit if the effects of ammonia haze opacity or NH3 supersaturation in the saturated region are taken into account. The Jovian temperature is found to be 160 + or - 7 K at 1 bar, and 105 + or - 3 K at the inversion level at 0.15 bar. The 1-bar temperature is shown to be consistent with Jovian interior models which match the observed gravitational moment.

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