Modelling interstellar extinction and polarization with spheroidal grains

被引：23

作者：

Voshchinnikov, N. V. ^{[1
]}

Das, H. K. ^{[2
]}

机构：

[1] St Petersburg Univ, Sobolev Astron Inst, St Petersburg 198504, Russia

[2] IUCAA, Pune 411007, Maharashtra, India

来源：

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2008年 / 109卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

light scattering; non-spherical particles; extinction; polarization;

D O I：

10.1016/j.jqsrt.2008.01.003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We calculate the wavelength dependence of the ratio of the linear polarization degree to extinction (polarizing efficiency) P(lambda)/A(lambda) from the ultraviolet to near-infrared. The prolate and oblate particles with aspect ratios from a/b = 1.1 up to 10 are assumed to be rotating and partially aligned with the mechanism of paramagnetic relaxation (Davis-Greenstein). Size/ shape/orientation effects are analyzed. It is found that the wavelength dependence of P(lambda)/A(lambda) is mainly determined by the particle composition and size whereas the values of P(lambda)/A(lambda) depend on the particle shape, degree and direction of alignment. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1527 / 1535

页数：9

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