THE UNIFIED SEYFERT SCHEME AND THE ORIGIN OF THE COSMIC X-RAY-BACKGROUND

被引：142
|
作者：
MADAU, P
GHISELLINI, G
FABIAN, AC
机构：
[1] OSSERV ASTRON TORINO,I-10025 PINO TORINESE,ITALY
[2] UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1994年 / 270卷 / 02期
关键词：
QUASARS; GENERAL; GALAXIES; SEYFERT; DIFFUSE RADIATION; X-RAYS;
D O I：
10.1093/mnras/270.1.L17
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss a simple model for the cosmic X-ray background (XRB), based on the unified Seyfert scheme. We show that a mixture of unabsorbed type 1 and absorbed type 2 Seyferts, integrated in redshift back to z = 3.5, can simultaneously reproduce the spectrum of the XRB from 1 to 150 keV and the source counts in both the soft and hard X-ray bands. The presence of numerous, heavily obscured sources with hard spectra at a flux level of 10(-12) erg cm(-2) s(-1) is indicated as a test of the model, in view of forthcoming ASCA observations.
引用
收藏
页码：L17 / L21
页数：5
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