Interpretation of the UV spectrum of some stars with little reddening

被引:10
作者
Zagury, F [1 ]
机构
[1] Nagoya Univ, Dept Astrophys, Nagoya, Aichi 46401, Japan
关键词
dust; extinction; ultraviolet : ISM;
D O I
10.1016/S1384-1076(00)00030-0
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The UV spectrum of a few reddened stars will be decomposed into two terms. One is the direct starlight, F(star,lambda)(0)e(-tau lambda), which is the product of the flux of the star corrected for interstellar extinction, F-star,lambda(0), and of the extinction e(-tau lambda). The second is starlight scattered by interstellar dust into the beam of the observation. This excess of scattered starlight affects the FUV part of the spectrum (lambda < 2200 Angstrom). The combination of both terms gives the shape of the UV spectrum of a reddened star, with its characteristic depression at 2200 Angstrom. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:285 / 298
页数:14
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