ALMA Lensing Cluster Survey: A spectral stacking analysis of [C II] in lensed <i>z</i> ∼ 6 galaxies

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dc.contributor.authorJolly, Jean-Baptiste
dc.contributor.authorKnudsen, Kirsten
dc.contributor.authorLaporte, Nicolas
dc.contributor.authorRichard, Johan
dc.contributor.authorFujimoto, Seiji
dc.contributor.authorKohno, Kotaro
dc.contributor.authorAo, Yiping
dc.contributor.authorBauer, Franz E.
dc.contributor.authorEgami, Eiichi
dc.contributor.authorEspada, Daniel
dc.contributor.authorDessauges-Zavadsky, Miroslava
dc.contributor.authorMagdis, Georgios
dc.contributor.authorSchaerer, Daniel
dc.contributor.authorSun, Fengwu
dc.contributor.authorValentino, Francesco
dc.contributor.authorWang, Wei-Hao
dc.contributor.authorZitrin, Adi
dc.date.accessioned2025-01-20T22:10:19Z
dc.date.available2025-01-20T22:10:19Z
dc.date.issued2021
dc.description.abstractContext. The properties of galaxies at redshift z>6 hold the key to our understanding of the early stages of galaxy evolution and can potentially identify the sources of the ultraviolet radiation that give rise to the epoch of reionisation. The far-infrared cooling line of [C II] at 158 mu m is known to be bright and correlate with the star formation rate (SFR) of low-redshift galaxies, and hence is also suggested to be an important tracer of star formation and interstellar medium properties for very high-redshift galaxies.
dc.description.abstractAims. With the aim to study the interstellar medium properties of gravitationally lensed galaxies at z>6, we search for [C II] and thermal dust emission in a sample of 52 > 6 galaxies observed by the ALMA Lensing Cluster Survey.
dc.description.abstractMethods. We perform our analysis using LINESTACKER, stacking both [C II] and continuum emission. The target sample is selected from multiple catalogues, and the sample galaxies have spectroscopic redshift or low-uncertainty photometric redshifts (sigma(z)<0.02) in nine galaxy clusters. Source properties of the target galaxies are either extracted from the literature or computed using spectral energy distribution fitting. Both weighted-average and median stacking are used, on both the full sample and three sub-samples.
dc.description.abstractResults. Our analyses find no detection of either [C II] or continuum. An upper limit on L-[CII] is derived, implying that [C II] remains marginally consistent for low-SFR z>6 galaxies but likely is under-luminous compared to the local L-[CII]-SFR relationship. We discuss potential biases and possible physical effects that may be the cause of the non-detection. Further, the upper limit on the dust continuum implies that less than half of the star formation is obscured.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/202140878
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/202140878
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94367
dc.identifier.wosidWOS:000687381700001
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectgalaxies: formation
dc.subjectgalaxies: statistics
dc.subjectgalaxies: high-redshift
dc.subjectradio lines: galaxies
dc.subjectgalaxies: evolution galaxies: star formation
dc.titleALMA Lensing Cluster Survey: A spectral stacking analysis of [C II] in lensed <i>z</i> ∼ 6 galaxies
dc.typeartículo
dc.volumen652
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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