On the absorption of X-rays in the interstellar medium

被引：3141
作者：
Wilms, J
Allen, A
McCray, R
机构：
[1] Inst Astron & Astrophys, Abt Astron, D-72076 Tubingen, Germany
[2] Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 542卷 / 02期
关键词：
atomic data; dust; extinction; ISM : abundances; X-rays : ISM;
D O I：
10.1086/317016
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present an improved model for the absorption of X-rays in the interstellar medium (ISM) intended for use with data from future X-ray missions with larger effective areas and increased energy resolution such as Chandra and the X-Ray Multiple Mirror mission, in the energy range greater than or similar to 100 eV. Compared with previous work, our formalism includes recent updates to the photoionization cross section and revised abundances of the interstellar medium, as well as a treatment of interstellar grains and the H-2 molecule. We review the theoretical and observational motivations behind these updates and provide a subroutine for the X-ray spectral analysis program XSPEC that incorporates our model.
引用
收藏
页码：914 / 924
页数：11
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