A Model for Interstellar Extinction |
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| Authors: | F Hoyle NC Wickramasinghe |
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| Institution: | (1) Department of Applied Mathematics and Astronomy, University College, Cardiff, U.K. |
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| Abstract: | From an analysis of the interstellar extinction we conclude that interstellar grains are of three main kinds: graphite spheres
of radii ∼ 0.02 μmmaking up ∼ ;10% of the total grain mass, small dielectric spheres of radius about 0.04 μm making up ∼ 25%
of the mass, and hollow dielectric cylinders containing metallic iron with diameters of ∼ 2/3 μmmaking up ∼ 45% of the mass.
The remaining ∼ 20%consists of other metals and metal oxides. The main dielectric component of the grains appears to be comprised
of organic material.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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