Far-infrared and submillimeter brightness temperatures of the giant planets |
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| Authors: | RH Hildebrand RF Loewenstein DA Harper GS Orton Jocelyn Keene SE Whitcomb |
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| Institution: | 1. Enrico Fermi Institute, Department of Astronomy and Astrophysics, and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA;2. Yerkes Observatory and Department of Astronomy and Astrophysics, University of Chicago, Williams Bay, Wisconsin 53191, USA;3. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA;4. Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA |
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| Abstract: | We have measured the brightness temperatures of Jupiter, Saturn, Uranus, and Neptune in the range 35 to 1000 μm. The effective temperatures derived from the measurements, supplemented by shorter wavelength Voyager data for Jupiter and Saturn, are 126.8 ± 4.5, 93.4 ± 3.3, 58.3 ± 2.0, and 60.3 ± 2.0°K, respectively. We discuss the implications of the measurements for bolometric output and for atmospheric structure and composition. The temperature spectrum of Jupiter shows a strong peak at ～350 μm followed by a deep valley at ～450 to 500 μm. Spectra derived from model atmospheres qualitatively reproduce these features but do not fit the data closely. |
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