Reflectance spectra of hydrated Titan tholins at cryogenic temperatures and implications for compositional interpretation of red objects in the outer Solar System |
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| Authors: | TL Roush JB Dalton |
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| Institution: | a NASA Ames Research Center, MS 245-3, Moffett Field, CA 94035-1000, USA
b SETI Institute, 2035 Landings Drive, Mountain View, CA 94043, USA |
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| Abstract: | We report the visible and near-infrared (0.4-2.5 μm) laboratory bidirectional reflectance of hydrated Titan tholin at cryogenic temperatures (∼100-300 K). When compared with room temperature measurements, the visible and near-infrared color of hydrated Titan tholin becomes bluer by ∼14% at low temperatures in the 0.7-1.0 μm region. Assuming the observed color changes are representative of tholin-like materials we estimate the influence of such color changes on the interpretation of the Centaur Pholus and find that the modest color changes will not significantly alter existing interpretations. |
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| Keywords: | Low-temperature reflectance spectra Titan tholins Solid organic residues Outer Solar System Compositional interpretation |
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