New Spectroscopic Confirmations of Ly<i>α</i> Emitters at <i>Z</i> ∼ 7 from the LAGER Survey

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dc.contributor.authorHarish, Santosh
dc.contributor.authorWold, Isak G. B.
dc.contributor.authorMalhotra, Sangeeta
dc.contributor.authorRhoads, James E.
dc.contributor.authorHu, Weida
dc.contributor.authorWang, Junxian
dc.contributor.authorZheng, Zhen-ya
dc.contributor.authorBarrientos, L. Felipe
dc.contributor.authorGonzalez-Lopez, Jorge
dc.contributor.authorPerez, Lucia A.
dc.contributor.authorKhostovan, Ali Ahmad
dc.contributor.authorInfante, Leopoldo
dc.contributor.authorJiang, Chunyan
dc.contributor.authorMoya-Sierralta, Cristobal
dc.contributor.authorPharo, John
dc.contributor.authorValdes, Francisco
dc.contributor.authorYang, Huan
dc.date.accessioned2025-01-20T21:03:23Z
dc.date.available2025-01-20T21:03:23Z
dc.date.issued2022
dc.description.abstractWe report spectroscopic confirmations of 15 Ly alpha galaxies at z similar to 7, implying a spectroscopic confirmation rate of similar to 80% on candidates selected from the Ly alpha Galaxies in the Epoch of Reionization (LAGER), which is the largest (24 deg(2)) survey aimed at finding Ly alpha emitters (LAEs) at z similar to 7 and uses deep narrowband imaging from the Dark Energy Camera at CTIO. LAEs at high redshifts are sensitive probes of cosmic reionization, and narrowband imaging is a robust and effective method for selecting a large number of LAEs. In this work, we present results from the spectroscopic follow-up of LAE candidates in two LAGER fields, COSMOS and WIDE-12, using observations from Keck/LRIS. We report the successful detection of Ly alpha emission in 15 candidates. Three of these in COSMOS have matching confirmations from a previous spectroscopic follow-up and are part of the overdense region, LAGER-z7OD1. Two other candidates that were not detected with LRIS have prior spectroscopic confirmations from Magellan. Including these, we obtain a spectroscopic confirmation success rate of similar to 80% for LAGER LAE candidates. Thorough checks were performed to reject the possibility of these detections being foreground emission resulting with a probability of, at most, one contaminant. We do not detect any other UV nebular lines in our LRIS spectra, apart from Ly alpha. We estimate a 2 sigma upper limit for the ratio of N v/Ly alpha, f (NV)/f (Ly alpha ) less than or similar to 0.27. Including confirmations from this work, a total of 33 LAE sources from LAGER are now spectroscopically confirmed. LAGER has more than doubled the sample of spectroscopically confirmed LAE sources at z similar to 7.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ac7cf1
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ac7cf1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93145
dc.identifier.wosidWOS:000835955200001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleNew Spectroscopic Confirmations of Ly<i>α</i> Emitters at <i>Z</i> ∼ 7 from the LAGER Survey
dc.typeartículo
dc.volumen934
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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