Interstellar extinction and the intrinsic colors of classical cepheids in the galaxy, the LMC, and the SMC

被引：2
|
作者：
Abrahamyan, GV
机构：
[1] V. A. Ambartsumyan Byurakan Astrophysical Observatory,
来源：
ASTROPHYSICS | 2003年 / 46卷 / 03期
关键词：
(stars : variables :)cepheids : interstellar extinction-individual : galaxy; LMC; SMC;
D O I：
10.1023/A:1025497513248
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
New methods are applied to samples of classical cepheids in the galaxy, the Large Magellanic Cloud, and the Small Magellanic Cloud to determine the interstellar extinction law for the classical cepheids, R-B: R-V: R-I: R-J: R-H: R-K = 4.190: 3.190: 1.884: 0.851: 0.501: 0.303, the color excesses for classical cepheids in the galaxy, E(B-V)=- 0.382-0.168logP+ 0.766(V- I), and the color excesses for classical cepheids in the LMC and SMC, E(B-V)=- 0.374- 0.166logP+ 0.766( V- I). The dependence of the intrinsic color (B-V)(0) on the metallicity of classical cepheids is discussed. The intrinsic color (V-I)(0) is found to be absolutely independent of the metallicity of classical cepheids. A high precision formula is obtained for calculating the intrinsic colors of classical cepheids in the galaxy: (<B>-<V>)(0)= 0.365(+/- 0.011)+ 0.328( +/- 0.012) logP.
引用
收藏
页码：304 / 318
页数：15
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