MODELING OF INTERSTELLAR EXTINCTION WITH COMPOSITE DUST GRAINS

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Abstract:

A model of interstellar dust must satisfy two conditions: dust grains have to be of the reasonable structure and chemical composition and explain basic observations. The latter are the interstellar extinction law and the depletion of interstellar elements. In this work, a new model of composite dust grains is considered. To calculate cross-sections of such particles the exact theory of light scattering by multi-layered grains is used. The results of modeling are compared with observations of the interstellar extinction toward the stars  Oph and 1 C Ori.

Keywords: Dust models; Interstellar extinction

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790215565

Affiliations: Astronomical Department, Faculty of Mathematics and Mechanics, Saint-Petersburg State University, Universitetsky prospect 28, Peterhof, Saint-Petersburg 198504, Russia

Publication date: January 1, 2002

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