Signatures of the baryon acoustic oscillations on 21 cm emission background

	Signatures of the baryon acoustic oscillations on 21 cm emission background
	Mao, Xiao-Chun1,2 ; Wu, Xiang-Ping1
刊名	ASTROPHYSICAL JOURNAL LETTERS
	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.