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IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization

文献类型：期刊论文

作者Xu, Yidong4; Chen, Xuelei2,3,4; Yue, Bin1; Xu,Yidong; Chen,Xuelei
刊名ASTROPHYSICAL JOURNAL
出版日期2017-08-01
卷号844期号:2
关键词Cosmology: Theory Intergalactic Medium Dark Ages Large-scale Structure Of Universe Reionization First Stars
DOI10.3847/1538-4357/aa7b71
文献子类Article
英文摘要We 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.
WOS关键词RADIATIVE-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
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000406476400006
资助机构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) ; 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)
源URL[http://ir.bao.ac.cn/handle/114a11/20079]  
专题国家天文台_星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Yidong,Chen, Xuelei,Yue, Bin,et al. IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization[J]. ASTROPHYSICAL JOURNAL,2017,844(2).
APA Xu, Yidong,Chen, Xuelei,Yue, Bin,Xu,Yidong,&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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