Isobaric Reconstruction of the Baryonic Acoustic Oscillation

doi:10.3847/2041-8213/aa738c

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	Isobaric Reconstruction of the Baryonic Acoustic Oscillation
	Wang, Xin 2; Yu, Hao-Ran 2,10; Zhu, Hong-Ming 3,5; Yu, Yu 6; Pan, Qiaoyin 8; Pen, Ue-Li 1,2,4,7,9
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2017-06-01
卷号	841 期号:2
关键词	Large-scale Structure Of Universe
ISSN号	2041-8205
DOI	10.3847/2041-8213/aa738c
英文摘要	In this Letter, we report a significant recovery of the linear baryonic acoustic oscillation (BAO) signature by applying the isobaric reconstruction algorithm to the nonlinear matter density field. Assuming only the longitudinal component of the displacement being cosmologically relevant, this algorithm iteratively solves the coordinate transform between the Lagrangian and Eulerian frames without requiring any specific knowledge of the dynamics. For dark matter field, it produces the nonlinear displacement potential with very high fidelity. The reconstruction error at the pixel level is within a few percent and is caused only by the emergence of the transverse component after the shell-crossing. As it circumvents the strongest nonlinearity of the density evolution, the reconstructed field is well described by linear theory and immune from the bulk-flow smearing of the BAO signature. Therefore, this algorithm could significantly improve the measurement accuracy of the sound horizon scale s. For a perfect large-scale structure survey at redshift zero without Poisson or instrumental noise, the fractional error Delta s/s is reduced by a factor of similar to 2.7, very close to the ideal limit with the linear power spectrum and Gaussian covariance matrix.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000425252400001
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32489]
专题	中国科学院上海天文台
通讯作者	Wang, Xin
作者单位	1.Canadian Inst Adv Res, CIFAR Program Gravitat & Cosmol, Toronto, ON M5G 1Z8, Canada 2.Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5H 3H8, Canada 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Perimeter Inst Theoret Phys, 31 Caroline St North, Waterloo, ON N2L 2Y5, Canada 5.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 7.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 8.Nankai Univ, Sch Phys, 94 Weijin Rd, Tianjin 300071, Peoples R China 9.Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada 10.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xin,Yu, Hao-Ran,Zhu, Hong-Ming,et al. Isobaric Reconstruction of the Baryonic Acoustic Oscillation[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,841(2).
APA	Wang, Xin,Yu, Hao-Ran,Zhu, Hong-Ming,Yu, Yu,Pan, Qiaoyin,&Pen, Ue-Li.(2017).Isobaric Reconstruction of the Baryonic Acoustic Oscillation.ASTROPHYSICAL JOURNAL LETTERS,841(2).
MLA	Wang, Xin,et al."Isobaric Reconstruction of the Baryonic Acoustic Oscillation".ASTROPHYSICAL JOURNAL LETTERS 841.2(2017).