A Lyman-α protocluster at redshift 6.9

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dc.contributor.authorHu, Weida
dc.contributor.authorWang, Junxian
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorRhoads, James E.
dc.contributor.authorZheng, Zhen-Ya
dc.contributor.authorYang, Huan
dc.contributor.authorMalhotra, Sangeeta
dc.contributor.authorBarrientos, L. Felipe
dc.contributor.authorJiang, Chunyan
dc.contributor.authorGonzález-López, Jorge
dc.contributor.authorPrieto, Gonzalo
dc.contributor.authorPerez, Lucia A.
dc.contributor.authorHibon, Pascale
dc.contributor.authorGalaz, Gaspar
dc.contributor.authorCoughlin, Alicia
dc.contributor.authorHarish, Santosh
dc.contributor.authorKong, Xu
dc.contributor.authorKang, Wenyong
dc.contributor.authorKhostovan, Ali Ahmad
dc.contributor.authorPharo, John
dc.contributor.authorValdes, Francisco
dc.contributor.authorWold, Isak
dc.contributor.authorWalker, Alistair R.
dc.contributor.authorZheng, XianZhong
dc.date.accessioned2023-05-19T20:45:36Z
dc.date.available2023-05-19T20:45:36Z
dc.date.issued2021
dc.description.abstractProtoclusters, 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.
dc.fechaingreso.objetodigital2024-12-19
dc.fuente.origenORCID-mayo23
dc.identifier.doi10.1038/s41550-020-01291-y
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/69504
dc.identifier.wosidWOS:000611456900001
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final490
dc.pagina.inicio485
dc.revistaNature Astronomy
dc.rightsacceso restringido
dc.titleA Lyman-α protocluster at redshift 6.9es_ES
dc.typeartículo
dc.volumenVol. 5
sipa.codpersvinculados1000955
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