HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4

doi:10.1093/mnras/staa1191

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	HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4
	Asorey, Jacobo 1; Parkinson, David 1; Shi, Feng 1; Song, Yong-Seon 1; Ahn, Kyungjin 2; Kim, Juhan 3; Yao, Jian 4; Zhang, Le 4,5; Zuo, Shifan 6,7,8
	2020-06-01
Source Publication	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
Volume	495 Issue:2 Pages:1788-1806
Abstract	The distribution of cosmological neutral hydrogen will provide a new window into the large-scale structure of the Universe with the next generation of radio telescopes and surveys. The observation of this material, through 21 cm line emission, will be confused by foreground emission in the same frequencies. Even after these foregrounds are removed, the reconstructed map may not exactly match the original cosmological signal, which will introduce systematic errors and offset into the measured correlations. In this paper, we simulate future surveys of neutral hydrogen using the Horizon Run 4 (HR4) cosmological N-body simulation. We generate HI intensity maps from the HR4 halo catalogue, and combine with foreground radio emission maps from the Global Sky Model, to create accurate simulations over the entire sky. We simulate the HI sky for the frequency range 700-800 MHz, matching the sensitivity of the Tianlai pathfinder. We test the accuracy of the fastICA, PCA, and log-polynomial fitting foreground removal methods to recover the input cosmological angular power spectrum and measure the parameters. We show the effect of survey noise levels and beam sizes on the recovered the cosmological constraints. We find that while the reconstruction removes power from the cosmological 21 cm distribution on large scales, we can correct for this and recover the input parameters in the noise-free case. However, the effect of noise and beam size of the Tianlai pathfinder prevents accurate recovery of the cosmological parameters when using only intensity mapping information.
Keyword	cosmology theory: dark energy: large-scale structure of Universe
Funding Organization	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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team
DOI	10.1093/mnras/staa1191
WOS Keyword	GALACTIC RADIO-EMISSION ; PROBING DARK ENERGY ; FOREGROUND REMOVAL ; CROSS-CORRELATION ; 10 MHZ ; SPACE ; MODEL ; SCALE ; OSCILLATIONS ; REIONIZATION
Language	英语
Funding Project	project ('Understanding Dark Universe Using Large Scale Structure of the Universe') - Ministry of Science ; National Science Foundation of China[11621303] ; National Science Foundation of China[11653003] ; National Science Foundation of China[11773021] ; National Science Foundation of China[11890691] ; National Key R&D Program of China[2018YFA0404601] ; National Key R&D Program of China[2018YFA0404504] ; 111 project ; CAS Interdisciplinary Innovation Team[JCTD-2019-05] ; [NRF-2016R1D1A1B04935414] ; [NRF-2016R1A5A1013277]
Funding Organization	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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program 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 Science Foundation of China ; National Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; 111 project ; 111 project ; CAS Interdisciplinary Innovation Team ; CAS Interdisciplinary Innovation Team
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000543015800019
Publisher	OXFORD UNIV PRESS
Citation statistics
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/82849
Collection	中国科学院国家天文台
Corresponding Author	Asorey, Jacobo; Parkinson, David
Affiliation	1.Korea Astron & Space Sci Inst, Daedeok Daero 776, Daejeon 34055, South Korea 2.Chosun Univ, Dept Earth Sci, Gwangju 61452, South Korea 3.Korea Inst Adv Study, Ctr Adv Computat, 85 Heogiro, Seoul 02455, South Korea 4.Shanghai Jiao Tong Univ, Sch Phys & 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, Key Lab Computat Astrophys, Natl Astron Observ, 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	Asorey, Jacobo,Parkinson, David,Shi, Feng,et al. HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,495(2):1788-1806.
APA	Asorey, Jacobo.,Parkinson, David.,Shi, Feng.,Song, Yong-Seon.,Ahn, Kyungjin.,...&Zuo, Shifan.(2020).HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,495(2),1788-1806.
MLA	Asorey, Jacobo,et al."HIR4: cosmology from a simulated neutral hydrogen full sky using Horizon Run 4".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 495.2(2020):1788-1806.

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