Physical Properties of Morphological Units on Comet 9P/Tempel 1 Derived from Near–IR Deep Impact Spectra
Résumé
In this paper we analyze near–infrared thermal emission spectra of the spatially resolved nucleus of Comet 9P/Tempel 1 obtained by the NASA spacecraft . Maps of spectral reddening, the product between the beaming function and directional emissivity, as well as surface temperature are constructed. Thermophysical modeling is used to estimate the degree of small scale surface roughness and thermal inertia by detailed reproduction of the empirical temperature map. Mie and Hapke theories are used in combination with numerically calculated beaming functions to analyze the map and place constraints on composition and grain size of the surface material.
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