Cosmic tidal reconstruction

	Cosmic tidal reconstruction
	Zhu, Hong-Ming1,2 ; Pen, Ue-Li 3,4,5; Yu, Yu 6; Er, Xinzhong 1,7; Chen, Xuelei1,2,8
刊名	PHYSICAL REVIEW D
	2016-05-04
卷号	93 期号:10
英文摘要	The gravitational coupling of a long-wavelength tidal field with small-scale density fluctuations leads to anisotropic distortions of the locally measured small-scale matter correlation function. Since the local correlation function is known to be statistically isotropic in the absence of such tidal interactions, the tidal distortions can be used to reconstruct the long-wavelength tidal field and large-scale density field in analogy with the cosmic microwave background lensing reconstruction. In this paper we present the theoretical framework of cosmic tidal reconstruction and test the reconstruction in numerical simulations. We find that the density field on large scales can be reconstructed with good accuracy and the cross-correlation coefficient between the reconstructed density field and the original density field is greater than 0.9 on large scales (k less than or similar to 0.1 h/Mpc), with the filter scale similar to 1.25 Mpc/h. This is useful in the 21 cm intensity mapping survey, where the long-wavelength radial modes are lost due to a foreground subtraction process.
收录类别	SCI
语种	英语
WOS记录号	WOS:000375657500002
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5379]
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, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5S 3H8, Canada 4.Canadian Inst Adv Res, CIFAR Program Gravitat & Cosmol, Toronto, ON M5G 1Z8, Canada 5.Perimeter Inst Theoret Phys, 31 Caroline St North, Waterloo, ON N2L 2Y5, Canada 6.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 7.Osserv Astron Roma, INAF, Via Frascati 33, I-00040 Monte Porzio Catone, Italy 8.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Hong-Ming,Pen, Ue-Li,Yu, Yu,et al. Cosmic tidal reconstruction[J]. PHYSICAL REVIEW D,2016,93(10).
APA	Zhu, Hong-Ming,Pen, Ue-Li,Yu, Yu,Er, Xinzhong,&Chen, Xuelei.(2016).Cosmic tidal reconstruction.PHYSICAL REVIEW D,93(10).
MLA	Zhu, Hong-Ming,et al."Cosmic tidal reconstruction".PHYSICAL REVIEW D 93.10(2016).