A resolved Lyman α profile with doubly peaked emission at z∼7

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dc.article.numberA98
dc.catalogadorpau
dc.contributor.authorMoya Sierralta, Cristobal
dc.contributor.authorGonzález López, Jorge
dc.contributor.authorInfante Lira Leopoldo
dc.contributor.authorBarrientos Parra, Luis Felipe
dc.contributor.authorHu, W.
dc.contributor.authorMalhotra, S.
dc.contributor.authorRhoads, J.
dc.contributor.authorWang, J.
dc.contributor.authorWold, I.
dc.contributor.authorZheng, Z.
dc.date.accessioned2025-04-08T15:58:33Z
dc.date.available2025-04-08T15:58:33Z
dc.date.issued2024
dc.description.abstract© The Authors 2024.Context. The epoch of reionization is a landmark in structure formation and galaxy evolution. How it happened is still not clear, especially regarding which population of objects was responsible for contributing the bulk of ionizing photons to this process. Doubly peaked Lyman-alpha profiles in this epoch are of particular interest since they hold information about the escape of ionizing radiation and the environment surrounding the source. Aims. We wish to understand the escape mechanisms of ionizing radiation in Lyα emitters during this time and the origin of a doubly peaked Lyman-alpha profile. We also wish to estimate the size of a potential ionized bubble. Methods. Using radiative transfer models, we fit the line profile of a bright Lyα emitter at z-≈-6.9 using various gas geometries. The line modeling reveals significant radiation escape from this system. Results. The studied source shows significant escape (fesc(Lyα) ≈ 0.8, as predicted by the best fitting radiative transfer model) and appears to inhabit an ionized bubble of radius Rb-0.8-0.3+0.5-pMpc(tage/108)1/3. Radiative transfer modeling predicts the line to be completely redward of the systemic redshift. We suggest the line morphology is produced by inflows, by multiple components emitting Lyα, or by an absorbing component in the red wing. Conclusions. We propose that CDFS-1-s profile has two red peaks produced by winds within the system. Its high fesc(Lyα) and the low-velocity offset from the systemic redshift suggest that the source is an active ionizing agent. Future observations will reveal whether a peak is present blueward of the systemic redshift or if multiple components produce the profile.
dc.description.funderJorryt Matthee and Aida Wofford
dc.description.funderChina-Chile Joint Research Fund
dc.description.funderCATA
dc.description.funderFONDECYT
dc.description.funderCCJRF
dc.description.funderANID
dc.fuente.origenSCOPUS
dc.identifier.doi10.1051/0004-6361/202450708
dc.identifier.issn1432-0746
dc.identifier.scopusidSCOPUS_ID:85211687794
dc.identifier.urihttps://doi.org/10.1051/0004-6361/202450708
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/103157
dc.information.autorucInstituto de Astrofísica; Moya Sierralta, Cristobal; S/I; 232601
dc.information.autorucInstituto de Astrofísica; González López, Jorge; S/I; 154597
dc.information.autorucInstituto de Física; Infante Lira Leopoldo; S/I; 55248
dc.information.autorucInstituto de Astrofísica; Barrientos Parra, Felipe; 0000-0003-0151-0718; 102167
dc.language.isoen
dc.publisherEDP Sciences
dc.revistaAstronomy and Astrophysics
dc.rightsacceso abierto
dc.subjectDark ages
dc.subjectFirst stars
dc.subjectReionization
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleA resolved Lyman α profile with doubly peaked emission at z∼7
dc.typeartículo
dc.volumen692
sipa.codpersvinculados232601
sipa.codpersvinculados154597
sipa.codpersvinculados55248
sipa.codpersvinculados102167
sipa.trazabilidadSCOPUS;2024-12-22
sipa.trazabilidadORCID;2025-03-03
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