Signatures of the baryon acoustic oscillations on 21 cm emission background | |
Mao, Xiao-Chun1,2![]() ![]() | |
刊名 | ASTROPHYSICAL JOURNAL LETTERS
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2008-02-01 | |
卷号 | 673期号:2页码:L107-L110 |
关键词 | cosmology : theory diffuse radiation intergalactic medium large scale structure of universe |
英文摘要 | The baryon acoustic oscillations (BAOs) prior to recombination should be imprinted onto the 21 cm emission background from the epoch of reionization through the underlying density perturbations. Using an analytical approach for both matter power spectrum (CDM + baryons) and reionization process, we demonstrate the BAO-induced signatures on the power spectrum of 21 cm emission fluctuations. Future low-frequency radio telescopes such as LOFAR and MWA should be able to detect these weak BAO wiggles with an integration time of similar to 1 yr. A combination of the BAO measurements at different redshifts z approximate to 1000 (CMB), z approximate to 10 (epoch of reionization), z approximate to 0 and (clustering of galaxies) may allow one to set more robust constraints on the determinations of cosmological parameters including dark energy and its equation of state. |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000255233000001 |
内容类型 | 期刊论文 |
源URL | [http://ir.bao.ac.cn/handle/114a11/7340] ![]() |
专题 | 国家天文台_星系宇宙学研究部 |
作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Mao, Xiao-Chun,Wu, Xiang-Ping. Signatures of the baryon acoustic oscillations on 21 cm emission background[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,673(2):L107-L110. |
APA | Mao, Xiao-Chun,&Wu, Xiang-Ping.(2008).Signatures of the baryon acoustic oscillations on 21 cm emission background.ASTROPHYSICAL JOURNAL LETTERS,673(2),L107-L110. |
MLA | Mao, Xiao-Chun,et al."Signatures of the baryon acoustic oscillations on 21 cm emission background".ASTROPHYSICAL JOURNAL LETTERS 673.2(2008):L107-L110. |
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