The origin of the cosmic X-ray background
The origin of the cosmic X-ray background
复制标题
DOI：
10.1038/353315a0
复制
发表时间：
1991-09
期刊：
影响因子：
64.8
通讯作者：
T. Shanks;I. Georgantopoulos;G. Stewart;K. Pounds;B. Boyle;R. Griffiths
中科院分区：
文献类型：
--
作者：
T. Shanks;I. Georgantopoulos;G. Stewart;K. Pounds;B. Boyle;R. Griffiths
Rosat X射线卫星的高分辨率图像显示了许多在0.1-2 keV能量范围内的微弱离散源。在英澳望远镜上进行的这些源的光谱学表明，它们中的许多是类星体，并且天空中类星体的推断密度至少贡献了1 keV宇宙X射线背景的30%。
A high-resolution image from the Rosat X-ray satellite reveals many faint discrete sources in the 0.1–2-keV energy range. Optical spectroscopy of these sources performed at the Anglo-Australian Telescope shows that many of them are quasars, and the inferred density of quasars on the sky contributes at least 30% of the cosmic X-ray background at 1 keV.