Infrared photometric and polarimetric observations of Comet Kohoutek 1973f |
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| Authors: | K Noguchi S Sato T Maihara H Okuda K Uyama |
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| Institution: | Department of Physics, Kyoto University, Kyoto, Japan;Department of Physics, Nagoya University, Nagoya, Japan |
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| Abstract: | Comet Kohoutek (1973f) has been observed photometrically and polarimetrically in the near-infrared region. The observed spectra revealed two components, scattered sunlight and thermal emission by dust particles. Color temperatures derived from intensities at 2.2 and 3.5 μm are close to the equilibrium temperature of a gray body with solar heating. Polarizations at 1.0 and 1.65 μm have been found to be ～15 to 20% and perpendicular to the tail direction. Properties of the dust particles in the comet are discussed in relation to these observations. |
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