کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5430143 1508706 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A study of frequency and size distribution dependence of extinction for astronomical silicate and graphite grains
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
A study of frequency and size distribution dependence of extinction for astronomical silicate and graphite grains
چکیده انگلیسی

It is generally agreed that interstellar dust grains consist of two main components, namely, silicates and graphites. Some models, like MRN model, assume these grains to be homogeneous spheres following a power-law size distribution. This paper presents, in the framework of Mie theory, a parametrization of extinction spectrum curves of the silicates and the graphites separately in terms of frequency and the minimum and maximum of sizes in the distribution. Analytic expressions in ultraviolet and far-ultraviolet are presented for both types of grains. The values of maximum and minimum sizes for which these equations are valid have been identified. These equations can be useful in a number of situations involving silicate and graphite grains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 110, Issues 14–16, September–November 2009, Pages 1733-1740
نویسندگان
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