| 星系团内物理过程对宇宙微波背景辐射的影响 |
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| 引用本文： | 吴建新,谢光中.星系团内物理过程对宇宙微波背景辐射的影响[J].中国天文和天体物理学报,1992(3). |
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| 作者姓名： | 吴建新 谢光中 |
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| 作者单位： | 中国科学院云南天文台，中国科学院云南天文台 昆明 650011，昆明 650011 |
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| 摘 要： | 观测表明,富星系团内存在着大量的高温热电子.它们将与微波背景光子相互作用.本文考虑了星系团集合使微波背景辐射产生的畸变.我们的理论估计表明,富星系团集合的高温热电子散射背景光子,使背景辐射谱偏离黑体辐射谱.在背景谱的维恩区,畸变小于2.74K黑体峰值强度的1％,这个结果与最近COBE卫星的探测结果是一致的.没有得到Matsumoto所探测到的在700μm附近有相当于黑体谱峰值强度10％的重大畸变.星系作为微引力透镜,对背景辐射的影响不可能探测得到.星系团内热电子的轫致辐射在微波波段更弱.
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| 关 键 词： | 观测宇宙学 背景辐射 Sunyaev-zel'dovich效应 |
Effect on the Microwave Background Radiation from Physical Processes in Rich Clusters of Galaxies |
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| Wu Jianxin Xie Guangahong.Effect on the Microwave Background Radiation from Physical Processes in Rich Clusters of Galaxies[J].Chinese Journal of Astronomy and Astrophysics,1992(3). |
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| Authors: | Wu Jianxin Xie Guangahong |
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| Abstract: | Observations show that a great deal of thermal elections exist in the rich clusters of galaxies. There is no question but that these thermal electrons interact with the microwave background photons. In this paper, we discuss the distortion of trie microwave background spectrum caused by the thermal electrons in all rich clusters of galaxies. The thermal electrons scatter off the background photons and make the spectrum deviate from the blackbody radiation. In the higher energy region, the distortion is less than 1% of the peak intensity of the 2.74 K blackbody radiation and it is agreeable with the observational data of the Cosmic Background Explorer (COBE). Our calculation does not agree with the great distortion (10% of the peak intensity of the 2.74K blackbody radiation) obtained by Matsumoto, et al., The effects on the background radiation from the micro-gravitational lenses by galaxies and from the bremsstrahlung of the hot plasma in the rich clusters of galaxies are too small to be observed |
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| Keywords: | Cosmology-background radiation |
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