The alma spectroscopic survey in the hubble ultra deep field: search for [CII] line and dust emission in 6 < z < 8 galaxies

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dc.contributor.authorAravena, M.
dc.contributor.authorDecarli, R.
dc.contributor.authorWalter, F.
dc.contributor.authorBouwens, R.
dc.contributor.authorOesch, P.A.
dc.contributor.authorCarilli, C.L.
dc.contributor.authorBauer, F.E.
dc.contributor.authorCunha, E. Da
dc.contributor.authorDaddi, E.
dc.contributor.authorGónzalez-López, J.
dc.contributor.authorIvison, R.J.
dc.contributor.authorRiechers, D.A.
dc.contributor.authorSmail, I.
dc.contributor.authorSwinbank, A.M.
dc.contributor.authorWeiss, A.
dc.contributor.authorAnguita, T.
dc.contributor.authorBacon, R.
dc.contributor.authorBell, E.
dc.contributor.authorBertoldi, F.
dc.contributor.authorCortes, P.
dc.contributor.authorCox, P.
dc.contributor.authorHodge, J.
dc.contributor.authorIbar, E.
dc.contributor.authorInami, H.
dc.contributor.authorInfante, L.
dc.contributor.authorKarim, A.
dc.contributor.authorMagnelli, B.
dc.contributor.authorOta, K.
dc.contributor.authorPopping, G.
dc.contributor.authorVan Der, Werf P.
dc.contributor.authorWagg, J.
dc.contributor.authorFudamoto, Y.
dc.date.accessioned2023-08-21T22:00:44Z
dc.date.available2023-08-21T22:00:44Z
dc.date.issued2016-12
dc.descriptionIndexación: Scopuses
dc.description.abstractWe present a search for [C II] line and dust continuum emission from optical dropout galaxies at z > 6 using ASPECS, our Atacama Large Millimeter submillimeter Array Spectroscopic Survey in the Hubble Ultra-deep Field (UDF). Our observations, which cover the frequency range of 212–272 GHz, encompass approximately the range of 6 < z < 8 for [C II] line emission and reach a limiting luminosity of L[C II] ∼ (1.6–2.5) × 108 Le. We identify 14 [C II] line emitting candidates in this redshift range with significances >4.5σ, two of which correspond to blind detections with no optical counterparts. At this significance level, our statistical analysis shows that about 60% of our candidates are expected to be spurious. For one of our blindly selected [C II] line candidates, we tentatively detect the CO(6-5) line in our parallel 3 mm line scan. None of the line candidates are individually detected in the 1.2 mm continuum. A stack of all [C II] candidates results in a tentative detection with S1.2 mm = 14 ± 5 μJy. This implies a dust-obscured star-formation rate (SFR) of (3 ± 1) Me yr−1 . We find that the two highest-SFR objects have candidate [C II] lines with luminosities that are consistent with the low-redshift L[C II] versus SFR relation. The other candidates have significantly higher [C II] luminosities than expected from their UV-based SFR. At the current sensitivity, it is unclear whether the majority of these sources are intrinsically bright [C II] emitters, or spurious sources. If only one of our line candidates was real (a scenario greatly favored by our statistical analysis), we find a source density for [C II] emitters at 6 < z < 8 that is significantly higher than predicted by current models and some extrapolations from galaxies in the local universe.es
dc.description.urihttps://iopscience-iop-org.recursosbiblioteca.unab.cl/article/10.3847/1538-4357/833/1/71
dc.identifier.citationAstrophysical Journal. Open Access. Volume 833, Issue 1. 10 December 2016. Article number 71es
dc.identifier.doi10.3847/1538-4357/833/1/71
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/52687
dc.language.isoenes
dc.publisherInstitute of Physics Publishinges
dc.rights.licenseAtribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectGalaxies: Evolutiones
dc.subjectGalaxies: High-Redshiftes
dc.subjectGalaxies: ISMes
dc.subjectGalaxies: Star Formationes
dc.subjectInstrumentation: Interferometerses
dc.subjectSubmillimeter: Galaxieses
dc.titleThe alma spectroscopic survey in the hubble ultra deep field: search for [CII] line and dust emission in 6 < z < 8 galaxieses
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