Cross-correlations between 21 cm, X-ray and infrared backgrounds
文献类型：期刊论文
| 作者 | Shan, Huan-Yuan; Qin, Bo
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2009 |
| 卷号 | 9期号:1页码:73-84 |
| 关键词 | cosmology: theory X-rays: diffuse background infrared: stars |
| 英文摘要 | The history of the cosmological reionization is still unclear. Two ionizing sources, stars and QSOs, are believed to play important roles during this epoch. Besides the 21 cm signals, the infrared emission from Pop III stars and X-ray photons from QSOs can be powerful probes of the reionization. Here we present a cross-correlation study of the 21 cm, infrared and X-ray backgrounds. The advantage of doing such cross-correlations is that we could highlight the correlated signals and eliminate irrelevant fore-grounds. We develop a shell model to describe the 21 cm signals and find that PopIII stars can provide higher 21 cm signals than QSOs. Using the ROSAT data for X-ray and AKARI data for infrared, we predict various cross power spectra analytically and discuss prospects for detecting these cross-correlation signals in future low frequency radio surveys. We find that, although these cross-correlational signals have distinct features, so far, they have been difficult to detect due to the high noise of the soft X-ray and infrared backgrounds given by ROSAT and AKARI. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000264770600006 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7553]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shan, Huan-Yuan,Qin, Bo. Cross-correlations between 21 cm, X-ray and infrared backgrounds[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(1):73-84. |
| APA | Shan, Huan-Yuan,&Qin, Bo.(2009).Cross-correlations between 21 cm, X-ray and infrared backgrounds.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(1),73-84. |
| MLA | Shan, Huan-Yuan,et al."Cross-correlations between 21 cm, X-ray and infrared backgrounds".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.1(2009):73-84. |
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来源：国家天文台
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