Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986afz....24..307v&link_type=abstract
(Astrofizika, vol. 24, Mar.-Apr. 1986, p. 307-320) Astrophysics (ISSN 0571-7132), vol. 24, no. 2, Sept. 1986, p. 179-187. Transl
Astronomy and Astrophysics
Astrophysics
3
Cosmic Dust, Interstellar Extinction, Interstellar Matter, Polarized Light, Grain Size, Silicates
Scientific paper
A model of two-layer cylindrical interstellar dust grains is used to calculate the interstellar extinction curves in the visible and NIR and the ratio R(V) of the total to the selective extinction. It is assumed that the core of the two-layer grains consists of 'astronomical silicate' and the mantle of dirty ice, and that they are completely or partly oriented via the Davis-Greenstein mechanism. A study is made of the dependence of R(V) on the diameter of the grains and the degree and direction of their orientation. It is shown that to find the total extinction it is best to use the relation A(V) = 1.1E (V-K), which holds to an accuracy 3 percent or less for a wide range of parameters.
Ilin A. E.
Ilin V. B.
Voshchinnikov Nikolai V.
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