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HIR4: cosmological signatures imprinted on the cross-correlation between a 21-cm map and galaxy clustering
Shi, Feng1; Song, Yong-Seon1; Asorey, Jacobo1,2; Parkinson, David1; Ahn, Kyungjin3; Yao, Jian4; Zhang, Le4,5; Zuo, Shifan6,7,8
2020-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume499Issue:4Pages:4613-4625
AbstractWe explore the cosmological multitracer synergies between an emission-line galaxy distribution from the Dark Energy Spectroscopic Instrument and a Tianlai Project 21-cm intensity map. We use simulated maps generated from a particle simulation in the light-cone volume (Horizon Run 4), sky-trimmed and including the effects of foreground contamination, its removal and instrument noise. We first validate how the foreground residual affects the recovered 21-cm signal by putting different levels of foreground contamination into the 21-cm maps. We find that the contamination cannot be ignored in the angular autocorrelation power spectra of HI even when it is small, but it has no influence on the accuracy of the angular cross-correlation power spectra between HI and galaxies. In the foreground-cleaned map case, as information is lost in the cleaning procedure, there is also a bias in the cross-correlation power spectrum. However, we found that the bias from the cross-correlation power spectrum is scale-independent, which is easily parametrized as part of the model, while the offset in the HI autocorrelation power spectrum is non-linear. In particular, we tested that the cross-correlation power also benefits from the cancellation of the bias in the power spectrum measurement that is induced by the instrument noise, which changes the shape of the autocorrelation power spectra but leaves the cross-correlation power spectra unaffected. We then modelled the angular cross-correlation power spectra to fit the baryon acoustic oscillation feature in the broad-band shape of the angular cross-correlation power spectrum, including contamination from the residual foreground and the effect of instrument noise. We forecast a constraint on the angular diameter distance D-A for the Tianlai Pathfinder redshift 0.775 < z < 1.03, giving a distance measurement with a precision of 2.7 per cent at that redshift.
Keyworddark energy large-scale structure of Universe cosmology: theory
Funding Organizationproject ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team
DOI10.1093/mnras/staa2914
WOS KeywordGALACTIC RADIO-EMISSION ; 10 MHZ ; INTENSITY ; MODEL ; HYDROGEN
Language英语
Funding Projectproject ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China[2018YFA0404504] ; National Key R&D Program of China[2018YFA0404601] ; National Science Foundation of China[11621303] ; National Science Foundation of China[11890691] ; National Science Foundation of China[11653003] ; National Science Foundation of China[11773021] ; 111 project ; CAS Interdisciplinary Innovation Team[JCTD-2019-05] ; [NRF-2016R1D1A1B04935414] ; [NRF-2016R1A5A1013277]
Funding Organizationproject ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000599131700003
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80445
Collection中国科学院国家天文台
Corresponding AuthorShi, Feng; Song, Yong-Seon
Affiliation1.Korea Astron & Space Sci Inst, Daedeok Daero 776, Daejeon 34055, South Korea
2.Ctr Invest Energet Medioambientales & Tecnol CIEM, Av Complutense 40, Madrid 28040, Spain
3.Chosun Univ, Dept Earth Sci, Gwangju 61452, South Korea
4.Shanghai Jiao Tong Univ, Dept Astron, Shanghai 200240, Peoples R China
5.Sun Yat Sen Univ, Sch Phys & Astron, 2 Daxue Rd, Tangjia 519082, Zhuhai, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100101, Peoples R China
7.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
8.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Shi, Feng,Song, Yong-Seon,Asorey, Jacobo,et al. HIR4: cosmological signatures imprinted on the cross-correlation between a 21-cm map and galaxy clustering[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,499(4):4613-4625.
APA Shi, Feng.,Song, Yong-Seon.,Asorey, Jacobo.,Parkinson, David.,Ahn, Kyungjin.,...&Zuo, Shifan.(2020).HIR4: cosmological signatures imprinted on the cross-correlation between a 21-cm map and galaxy clustering.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,499(4),4613-4625.
MLA Shi, Feng,et al."HIR4: cosmological signatures imprinted on the cross-correlation between a 21-cm map and galaxy clustering".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 499.4(2020):4613-4625.
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