LAGER Lyα Luminosity Function at z ∼ 7: Implications for Reionization

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dc.contributor.authorWold, Isak G. B.
dc.contributor.authorMalhotra, Sangeeta
dc.contributor.authorRhoads, James
dc.contributor.authorWang, Junxian
dc.contributor.authorHu, Weida
dc.contributor.authorPerez, Lucia A.
dc.contributor.authorZheng, Zhen-Ya
dc.contributor.authorKhostovan, Ali Ahmad
dc.contributor.authorWalker, Alistair R.
dc.contributor.authorBarrientos, L. Felipe
dc.contributor.authorGonzález-López, Jorge
dc.contributor.authorHarish, Santosh
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorJiang, Chunyan
dc.contributor.authorPharo, John
dc.contributor.authorMoya-Sierralta, Cristóbal
dc.contributor.authorBauer, Franz E.
dc.contributor.authorGalaz, Gaspar
dc.contributor.authorValdes, Francisco
dc.contributor.authorYang, Huan
dc.date.accessioned2023-05-19T20:50:08Z
dc.date.available2023-05-19T20:50:08Z
dc.date.issued2022
dc.description.abstractWe present a new measurement of the Ly alpha luminosity function (LF) at redshift z = 6.9, finding moderate evolution from z = 5.7 that is consistent with a fully or largely ionized z similar to 7 intergalactic medium. Our result is based on four fields of the LAGER (Lyman Alpha Galaxies in the Epoch of Reionization) project. Our survey volume of 6.1 x 10(6) Mpc(3) is double that of the next largest z similar to 7 survey. We combine two new LAGER fields (WIDE12 and GAMA15A) with two previously reported LAGER fields (COSMOS and CDFS). In the new fields, we identify N = 95 new z = 6.9 Ly alpha emitter (LAEs) candidates, characterize our survey's completeness and reliability, and compute Ly alpha LFs. The best-fit Schechter LF parameters for all four LAGER fields are in good general agreement. Two fields (COSMOS and WIDE12) show evidence for a bright-end excess above the Schechter function fit. We find that the Ly alpha luminosity density declines at the same rate as the UV continuum LF from z = 5.7 to 6.9. This is consistent with an intergalactic medium that was fully ionized as early as redshift z similar to 7 or with a volume-averaged neutral hydrogen fraction of x (H I) < 0.33 at 1 sigma.
dc.fechaingreso.objetodigital2024-10-17
dc.fuente.origenORCID-mayo23
dc.identifier.doi10.3847/1538-4357/ac4997
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/70168
dc.identifier.wosidWOS:000763683300001
dc.issue.numeroNo. 1
dc.language.isoen
dc.nota.accesocontenido completo
dc.pagina.final15
dc.pagina.inicio1
dc.revistaAstrophysical Journal
dc.rightsacceso abierto
dc.titleLAGER Lyα Luminosity Function at z ∼ 7: Implications for Reionizationes_ES
dc.typeartículo
dc.volumenVol. 927
sipa.codpersvinculados1000955
sipa.indexWOS
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