Lensing of 21-cm absorption haloes of z similar to 2-30 first galaxies
文献类型:期刊论文
作者 | Zhang, Pengjie; Zheng, Zheng; Cen, Renyue |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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出版日期 | 2007-12-11 |
卷号 | 382期号:3页码:1087-1093 |
关键词 | gravitational lensing cosmology theory large-scale structure of Universe |
英文摘要 | Extended 21-cm absorption regions ( dubbed '21-cm absorption haloes') around first galaxies at z similar to 30 are likely the first distinctive structures accessible to radio observations. Though the radio array capable of detecting and resolving them must have similar to 200 km(2) total collecting area, given the great impact of such detections to the understanding of the reionization process and cosmology, such radio survey would be extremely profitable. As an example, we point out a potentially useful byproduct of such survey. The resolved 21-cm absorption 'haloes', likely close to spherical, can serve as ( almost) ideal sources for measuring the cosmic shear and mapping the matter distribution to z similar to 30. We investigate the expected lensing signal and consider a variety of noise contributions on the shear measurement. We find that signal-to-noise ratio (S/N) similar to 1 can be achieved for individual 'haloes'. Given millions of 21-cm absorption 'haloes' across the sky, the total S/N will be comparable to traditional shear measurement of similar to 109 galaxies at z similar to 1. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | LARGE-SCALE STRUCTURE ; POWER SPECTRA ; COSMIC SHEAR ; WEAK ; REIONIZATION ; RECONSTRUCTION ; FLUCTUATIONS ; EPOCH ; PROBE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000251252600013 |
源URL | [http://119.78.226.72/handle/331011/19452] ![]() |
专题 | 上海天文台_星系宇宙学重点实验室 |
作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Inst Adv Study, Princeton, NJ 08540 USA 3.Princeton Univ, Princeton Univ Observ, Princeton, NJ 08544 USA |
推荐引用方式 GB/T 7714 | Zhang, Pengjie,Zheng, Zheng,Cen, Renyue. Lensing of 21-cm absorption haloes of z similar to 2-30 first galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,382(3):1087-1093. |
APA | Zhang, Pengjie,Zheng, Zheng,&Cen, Renyue.(2007).Lensing of 21-cm absorption haloes of z similar to 2-30 first galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,382(3),1087-1093. |
MLA | Zhang, Pengjie,et al."Lensing of 21-cm absorption haloes of z similar to 2-30 first galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 382.3(2007):1087-1093. |
入库方式: OAI收割
来源:上海天文台
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