X-ray background, discrete sources, and diffuse processes
X-ray background, discrete sources, and diffuse processes
复制标题
X 射线背景、离散源和扩散过程
DOI：
10.1086/164944
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
G. Zamorani
中科院分区：
文献类型：
--
作者：
R. Giacconi;G. Zamorani
讨论了能量为3-50keV的宇宙剩余X射线背景(XRB)辐射的可能来源。已经确定的来源至少可以占XRB的50%。剩余能谱具有高达30keV的平坦斜率。康普顿化的热气发射被排除为辐射的来源，因为发射区域将是扩散的，而康普顿化需要的区域跨度不超过几秒。虽然爱因斯坦天文台无法获得相关的光谱，但来自离散来源的光学薄韧致辐射是一个更可行的候选方案。讨论了AXAF和ROSAT卫星在成像和光谱模式下的未来观测，以获得关于XRB真实来源的确切数据。参考文献58篇。
Possible sources are discussed for the cosmic residual X-ray background (XRB) radiation at energies from 3-50 keV. Sources have been identified that can account for at least 50 percent of the XRB. The residual has a spectrum with a flat slope up to 30 keV. Comptonized thermal gas emission is ruled out as the origin of the radiation since the emitting regions would be diffuse and Comptonization would require regions no more than a parsec across. Optically thin bremsstrahlung from discrete sources is a more viable candidate, although the associated spectra would not have been accessible with the Einstein Observatory. Future observations with the AXAF and ROSAT satellites in imaging and spectroscopic modes are discussed for gaining definitive data on the real sources of the XRB. 58 references.