The 1-mm brightness temperature of titan |
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| Authors: | T.L. Roellig D.J. Ennis J.R. Houck |
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| Affiliation: | 1. Center for Radiophysics and Space Research, Cornell University, Ithaca, New York 14853, USA;2. Department of Physics, California Institute of Technology, Pasadena, California 91125, USA |
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| Abstract: | Titan has been observed with the 5-m Hale telescope at an effective wavelength of 1 mm. Adopting a value of 2700 km for the radius of Titan, we find a brightness temperature of 86±12°K at 1 mm. Comparing our results with previous measurements at longer wavelengths, we conclude that the satellite surface is the source of the 1-mm radiation. Since our measured brightness temperature is close to the equilibrium temperature of a blackbody at the distance of Saturn, we believe there is no significant greenhouse effect on Titan. |
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