KMS National Astronomical Observatories, CAS
| A Lyman-alpha protocluster at redshift 6.9 | |
| Hu, Weida1,2; Wang, Junxian1,2; Infante, Leopoldo3,4,5; Rhoads, James E.6; Zheng, Zhen-Ya7; Yang, Huan3; Malhotra, Sangeeta6; Barrientos, L. Felipe4; Jiang, Chunyan7; Gonzalez-Lopez, Jorge3,5; Prieto, Gonzalo4; Perez, Lucia A.8; Hibon, Pascale9; Galaz, Gaspar4; Coughlin, Alicia8; Harish, Santosh8; Kong, Xu1; Kang, Wenyong1; Khostovan, Ali Ahmad6; Pharo, John8; Valdes, Francisco10; Wold, Isak6; Walker, Alistair R.11; Zheng, XianZhong12 | |
| 2021-01-25 | |
| Source Publication | NATURE ASTRONOMY
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| ISSN | 2397-3366 |
| Pages | 7 |
| Abstract | Protoclusters, the progenitors of the most massive structures in the Universe, have been identified at redshifts of up to 6.6 (refs. (1-6)). Besides exploring early structure formation, searching for protoclusters at even higher redshifts is particularly useful to probe the reionization. Here we report the discovery of the protocluster LAGER-z7OD1 at a redshift of 6.93, when the Universe was only 770 million years old and could be experiencing rapid evolution of the neutral hydrogen fraction in the intergalactic medium(7,8). The protocluster is identified by an overdensity of 6 times the average galaxy density, and with 21 narrowband selected Lyman-alpha galaxies, among which 16 have been spectroscopically confirmed. At redshifts similar to or above this record, smaller protogroups with fewer members have been reported(9,10). LAGER-z7OD1 shows an elongated shape and consists of two subprotoclusters, which would have merged into one massive cluster with a present-day mass of 3.7 x 10(15) solar masses. The total volume of the ionized bubbles generated by its member galaxies is found to be comparable to the volume of the protocluster itself, indicating that we are witnessing the merging of the individual bubbles and that the intergalactic medium within the protocluster is almost fully ionized. LAGER-z7OD1 thus provides a unique natural laboratory to investigate the reionization process. |
| Funding Organization | National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team |
| DOI | 10.1038/s41550-020-01291-y |
| WOS Keyword | CONTINUUM ESCAPE FRACTION ; DARK-MATTER ; COSMOLOGICAL REIONIZATION ; LUMINOSITY FUNCTION ; EMITTING GALAXIES ; EMITTERS ; CONSTRAINTS ; EPOCH ; Z=6.5 ; OVERDENSITY |
| Language | 英语 |
| Funding Project | National Science Foundation of China[11421303] ; National Science Foundation of China[11890693] ; National Science Foundation of China[11773051] ; National Science Foundation of China[12022303] ; CAS Frontier Science Key Research Program[QYZDJ-SSW-SLH006] ; CAS Pioneer Hundred Talents Program ; US National Science Foundation[AST-1518057] ; NASA through WFIRST Science Investigation Team[NNG16PJ33C] |
| Funding Organization | National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team ; National Science Foundation of China ; National Science Foundation of China ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; CAS Pioneer Hundred Talents Program ; CAS Pioneer Hundred Talents Program ; US National Science Foundation ; US National Science Foundation ; NASA through WFIRST Science Investigation Team ; NASA through WFIRST Science Investigation Team |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000611456900001 |
| Publisher | NATURE RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/79875 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Hu, Weida; Wang, Junxian |
| Affiliation | 1.Univ Sci & Technol China, CAS Key Lab Res Galaxies & Cosmol, Dept Astron, Hefei, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei, Peoples R China 3.Carnegie Inst Sci, Las Campanas Observ, La Serena, Chile 4.Pontificia Univ Catolica Chile, Fac Fis, Inst Astrofis, Santiago, Chile 5.Univ Diego Portales, Fac Ingn & Ciencias, Nucleo Astron, Santiago, Chile 6.Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD USA 7.Shanghai Astron Observ, CAS Key Lab Res Galaxies & Cosmol, Shanghai, Peoples R China 8.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA 9.European Southern Observ, Santiago, Chile 10.NSFs NOIRLab, Community Sci & Data Ctr, Tucson, AZ USA 11.NSFs NOIRLab, Cerro Tololo Interamer Observ, La Serena, Chile 12.Chinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China |
| Recommended Citation GB/T 7714 | Hu, Weida,Wang, Junxian,Infante, Leopoldo,et al. A Lyman-alpha protocluster at redshift 6.9[J]. NATURE ASTRONOMY,2021:7. |
| APA | Hu, Weida.,Wang, Junxian.,Infante, Leopoldo.,Rhoads, James E..,Zheng, Zhen-Ya.,...&Zheng, XianZhong.(2021).A Lyman-alpha protocluster at redshift 6.9.NATURE ASTRONOMY,7. |
| MLA | Hu, Weida,et al."A Lyman-alpha protocluster at redshift 6.9".NATURE ASTRONOMY (2021):7. |
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