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IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization
Xu, Yidong1; Yue, Bin2; Chen, Xuelei1,3,4
2017-08-01
Source PublicationASTROPHYSICAL JOURNAL
Volume844Issue:2
AbstractWe present the algorithm and main results of our semi-numerical simulation, islandFAST, which was developed from 21 cmFAST and designed for the late stage of reionization. The islandFAST simulation predicts the evolution and size distribution of the large-scale underdense neutral regions (neutral islands), and we find that the late Epoch of Reionization proceeds very fast, showing a characteristic scale of the neutral islands at each redshift. Using islandFAST, we compare the impact of two types of absorption systems, i.e., the large-scale underdense neutral islands versus small-scale overdense absorbers, in regulating the reionization process. The neutral islands dominate the morphology of the ionization field, while the small-scale absorbers dominate the mean-free path of ionizing photons, and also delay and prolong the reionization process. With our semi-numerical simulation, the evolution of the ionizing background can be derived self-consistently given a model for the small absorbers. The hydrogen ionization rate of the ionizing background is reduced by an order of magnitude in the presence of dense absorbers.
SubtypeArticle
KeywordCosmology: Theory Intergalactic Medium Dark Ages Large-scale Structure Of Universe Reionization First Stars
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNSFC key project(11633004 ; NSFC key project(11633004 ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; NSFC(11653003) ; NSFC(11653003) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; MoST(2012AA121701 ; MoST(2012AA121701 ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; Strategic Priority Research Program(XDB09020301) ; Strategic Priority Research Program(XDB09020301) ; 11303034 ; 11303034 ; 2016YFE0100300) ; 2016YFE0100300) ; 11373030) ; 11373030) ; NSFC key project(11633004 ; NSFC key project(11633004 ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; NSFC(11653003) ; NSFC(11653003) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; MoST(2012AA121701 ; MoST(2012AA121701 ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; Strategic Priority Research Program(XDB09020301) ; Strategic Priority Research Program(XDB09020301) ; 11303034 ; 11303034 ; 2016YFE0100300) ; 2016YFE0100300) ; 11373030) ; 11373030)
DOI10.3847/1538-4357/aa7b71
WOS KeywordRADIATIVE-TRANSFER SIMULATIONS ; QUASAR ULAS J1120+0641 ; SMALL-SCALE STRUCTURE ; N-BODY SIMULATIONS ; CM POWER SPECTRUM ; ALPHA FOREST DATA ; COSMIC REIONIZATION ; LY-ALPHA ; ABSORPTION SYSTEMS ; HII-REGIONS
Indexed BySCI
Language英语
Funding OrganizationNSFC key project(11633004 ; NSFC key project(11633004 ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; NSFC(11653003) ; NSFC(11653003) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; MoST(2012AA121701 ; MoST(2012AA121701 ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; Strategic Priority Research Program(XDB09020301) ; Strategic Priority Research Program(XDB09020301) ; 11303034 ; 11303034 ; 2016YFE0100300) ; 2016YFE0100300) ; 11373030) ; 11373030) ; NSFC key project(11633004 ; NSFC key project(11633004 ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; NSFC(11653003) ; NSFC(11653003) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; MoST(2012AA121701 ; MoST(2012AA121701 ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; CAS Frontier Science Key Project(QYZDJ-SSW-SLH017) ; Strategic Priority Research Program(XDB09020301) ; Strategic Priority Research Program(XDB09020301) ; 11303034 ; 11303034 ; 2016YFE0100300) ; 2016YFE0100300) ; 11373030) ; 11373030)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000406476400006
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/20079
Collection星系宇宙学研究部
Affiliation1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Xu, Yidong,Yue, Bin,Chen, Xuelei. IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization[J]. ASTROPHYSICAL JOURNAL,2017,844(2).
APA Xu, Yidong,Yue, Bin,&Chen, Xuelei.(2017).IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization.ASTROPHYSICAL JOURNAL,844(2).
MLA Xu, Yidong,et al."IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization".ASTROPHYSICAL JOURNAL 844.2(2017).
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