The contribution of AGN to the X-ray background: the effect of iron features

被引：23
|
作者：
Gilli, R
Comastri, A
Brunetti, G
Setti, G
机构：
[1] Univ Florence, Dipartimento Astron, I-50125 Florence, Italy
[2] CNR, Ist Radioastron, I-40129 Bologna, Italy
[3] Osservatorio Astron Bologna, I-40127 Bologna, Italy
[4] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy
来源：
NEW ASTRONOMY | 1999年 / 4卷 / 01期
关键词：
X-rays : galaxies; galaxies : Seyfert; diffuse radiation;
D O I：
10.1016/S1384-1076(99)00004-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The contribution of the iron emission line, commonly detected in the X-ray spectra of Seyfert (Sey) galaxies, to the cosmic X-ray background (XRB) spectrum is evaluated in the framework of the XRB synthesis models based on AGN unification schemes. To derive the mean line properties, we have carried out a search in the literature covering a sample of about 70 AGN. When adopting line parameters in agreement with the observations, it turns out that the maximum contribution of the iron line to the XRB is less than 7% at a few keV. This is still below the present uncertainties in the XRB spectrum measurements. (C) 1999 Elsevier Science B. V. All rights reserved.
引用
收藏
页码：45 / 57
页数：13
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