Infrared photometry of comets Bowell and P/Stephan-Oterma |
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Authors: | Glenn J. Veeder Martha S. Hanner |
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Affiliation: | Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109USA |
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Abstract: | We report broadband infrared photometry of comets P/Stephan-Oterma and Bowell between 1 and 20 μm. Their JHK colors are similar to P/Meier and P/Tuttle and are compatible with scattering of sunlight by micron-sized grains. The thermal emission from P/Stephan-Oterma showed an effective temperature significantly higher than that expected from a blackbody in equilibrium. The thermal emission can be models be fit by models of the dust coma consisting of micron-sized grains. Most of the flux at all observed wavelengths comes from the dust grains rather than form the nucleus. |
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