The ultraviolet extinction by hollow spherical particles of graphite |
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Authors: | T Inagaki Y Yamamoto S Yabushita |
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Institution: | (1) Physics Department, Osaka Kyoiku University, Tennoji, Osaka, Japan;(2) Department of Applied Mathematics and Physics, Kyoto University, Kyoto, Japan |
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Abstract: | Using the discrete dipole approximation, we have calculated the extinction efficiency of hollow spherical particles of graphite as a possible constituent of interstellar grains. The particles had a shell structure with the basal plane perpendicular to the radius. The calculations were made on the particles having the outer radiusR
0=10 and 5nm in the wave number region from 0.8 to 8.0 m–1 using the anisotropic optical constants. It was found that the hollow particles with the inner radiusR
1 0.65R
0 yield an extinction feature at 4.6 m–1, which fits fairly well to one observed in the interstellar extinction. |
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