Galaxy Protoclusters as Drivers of Cosmic Reionization: I. Bubble Overlap at Redshift z ∼ 7 in LAGER-z7OD1

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dc.catalogadorjlo
dc.contributor.authorMartin, Crystal L.
dc.contributor.authorHu, Weida
dc.contributor.authorWold, Isak G. B.
dc.contributor.authorFaisst, Andreas
dc.contributor.authorMoya Sierralta, Cristóbal Andrés
dc.contributor.authorMalhotra, Sangeeta
dc.contributor.authorRhoads, James E.
dc.contributor.authorBarrientos Parra, Luis Felipe
dc.contributor.authorHarikane, Yuichi
dc.contributor.authorInfante Lira, Leopoldo
dc.contributor.authorKoekemoer, Anton M.
dc.contributor.authorGonzález López, Jorge
dc.contributor.authorOuchi, Masami
dc.contributor.authorXu, Junyan
dc.contributor.authorYang, Jiayang
dc.contributor.authorYung, L. Y. Aaron
dc.contributor.authorWeaver, John R.
dc.contributor.authorMcCracken, Henry
dc.contributor.authorZheng, Zhenya
dc.contributor.authorWang, Junxian
dc.date.accessioned2026-01-22T19:39:37Z
dc.date.available2026-01-22T19:39:37Z
dc.date.issued2026
dc.description.abstractSince the launch of JWST, the sample size of reionization-era Lyα emitters (LAEs) has been steadily growing; yet inferences about the neutral hydrogen fraction in the intergalactic medium exhibit increasing variance at redshift z ≈ 7, possibly indicating significant field-to-field fluctuations in the progression of cosmic reionization. In this paper, we present new JWST/NIRSpec and Keck/LRIS spectra of nine LAEs in the redshift z ∼ 7 protocluster LAGER-z7OD1. Measurements of Lyα transmission and Lyα velocity offset along multiple sight lines map the Lyα damping wing optical depth across the galaxy overdensity. In the standard context of inside-out ionization, we estimate the radii of ionized bubbles, 0.69 Mpc (physical), based on the distance from each LAE to the first neutral patch along the sight line. The resulting 3D topology reveals three distinct subclusters where the ionized bubbles are approaching overlap. Five of the nine LAEs plausibly ionized their bubbles, where a few bursts of star formation and a modest escape fraction are sufficient. We demonstrate, however, that the actual ionized volumes are likely larger, at least = 0.42–1.29 Mpc (physical), based on an empirical model for interstellar attenuation of Lyα. Modeling galactic attenuation of Lyα significantly increases the inferred intergalactic transmission (thus enlarging the ionized path length). The error bars on the reddening correction allow fully overlapping bubbles, and our results are consistent with accelerated reionization in the protocluster.
dc.fechaingreso.objetodigital2026-01-22
dc.format.extent32 páginas
dc.fuente.origenORCID
dc.identifier.doi10.3847/1538-4357/ae1d6b
dc.identifier.issn1538-4357
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ae1d6b
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/107838
dc.information.autorucInstituto de Astrofísica; Moya Sierralta, Cristóbal Andrés; S/I; 232601
dc.information.autorucInstituto de Astrofísica; Barrientos Parra, Luis Felipe; 0000-0003-0151-0718; 102167
dc.information.autorucInstituto de Astrofísica; Infante Lira, Leopoldo; S/I; 55248
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaThe Astrophysical Journal
dc.rightsacceso abierto
dc.subjectReionisation
dc.subjectAGN host galaxies
dc.subjectGalaxy evolution
dc.subjectInteracting galaxies
dc.subjectHigh-redshift galaxies
dc.subject.ddc520
dc.titleGalaxy Protoclusters as Drivers of Cosmic Reionization: I. Bubble Overlap at Redshift z ∼ 7 in LAGER-z7OD1
dc.typeartículo
sipa.codpersvinculados232601
sipa.codpersvinculados102167
sipa.codpersvinculados55248
sipa.trazabilidadORCID;2026-01-19
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