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Isobaric Reconstruction of the Baryonic Acoustic Oscillation
Wang, Xin1; Yu, Hao-Ran1,2; Zhu, Hong-Ming3,4; Yu, Yu5; Pan, Qiaoyin6; Pen, Ue-Li1,7,8,9,10
2017-06-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume841Issue:2Pages:5
AbstractIn 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.
Keywordlarge-scale structure of universe
DOI10.3847/2041-8213/aa738c
WOS KeywordPROBING DARK ENERGY ; INITIAL CONDITIONS ; COSMOLOGICAL DENSITY ; CENT DISTANCE ; UNIVERSE ; FIELDS ; SCALE ; FLUCTUATIONS ; ALGORITHM ; EQUATIONS
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000425252400001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/35991
Collection中国科学院国家天文台
Corresponding AuthorWang, Xin
Affiliation1.Canadian Inst Theoret Astrophys, 60 St George St, Toronto, ON M5H 3H8, Canada
2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
6.Nankai Univ, Sch Phys, 94 Weijin Rd, Tianjin 300071, Peoples R China
7.Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada
8.Canadian Inst Adv Res, CIFAR Program Gravitat & Cosmol, Toronto, ON M5G 1Z8, Canada
9.Perimeter Inst Theoret Phys, 31 Caroline St North, Waterloo, ON N2L 2Y5, Canada
10.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
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):5.
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),5.
MLA Wang, Xin,et al."Isobaric Reconstruction of the Baryonic Acoustic Oscillation".ASTROPHYSICAL JOURNAL LETTERS 841.2(2017):5.
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