A model for the distribution of material generating the soft X-ray background

被引：184

作者：

Snowden, S. L.

Cox, D. P.

McCammon, D.

Sanders, W. T.

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Max Planck Inst Extraterr Phys, D-8046 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 354卷 / 01期

关键词：

interstellar : matter; radiation mechanisms; X-rays : sources;

D O I：

10.1086/168680

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the observational evidence relating to the soft X-ray diffuse background and present a simple model for its source and spatial structure. In this simple model with one free parameter, the observed 1/4 keV X-ray intensity originates as thermal emission from a uniform hot (T similar to 10(6.0) K) plasma filling a cavity in the neutral material of the galactic disk which contains the Sun. Variations in the observed X-ray intensity are due to variations in the extent of the emission volume and therefore the emission measure of the plasma. The model reproduces the observed negative correlation between X-ray intensity and H I column density and predicts reasonable values for interstellar medium (ISM) parameters.

引用

页码：211 / 219

页数：9

共 62 条

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