CANDELSz7: A large spectroscopic survey of CANDELS galaxies in the reionization epoch

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cam.issuedOnline2018-11-19
cam.orpheus.successThu Jan 30 10:53:40 GMT 2020 - The item has an open VoR version.
dc.contributor.authorPentericci, L
dc.contributor.authorVanzella, E
dc.contributor.authorCastellano, M
dc.contributor.authorFontana, A
dc.contributor.authorDe Barros, S
dc.contributor.authorGrazian, A
dc.contributor.authorMarchi, F
dc.contributor.authorBradac, M
dc.contributor.authorConselice, CJ
dc.contributor.authorCristiani, S
dc.contributor.authorDickinson, M
dc.contributor.authorFinkelstein, SL
dc.contributor.authorGiallongo, E
dc.contributor.authorGuaita, L
dc.contributor.authorKoekemoer, AM
dc.contributor.authorMaiolino, R
dc.contributor.authorSantini, P
dc.contributor.authorTilvi, V
dc.contributor.orcidMaiolino, Roberto [0000-0002-4985-3819]
dc.date.accessioned2018-12-12T00:30:12Z
dc.date.available2018-12-12T00:30:12Z
dc.date.issued2018
dc.description.abstractWe present the results of CANDELSz7, an ESO large program aimed at confirming spectroscopically a homogeneous sample of z~6 and z~7 star forming galaxies. The candidates were selected in the GOODS-South, UDS and COSMOS fields using the official CANDELS catalogs based on H160-band detections. Standard color criteria, which were tailored depending on the ancillary multi-wavelength data available for each field, were applied to select more than 160 candidate galaxies at z~6 and z~7. Deep medium resolution FORS2 spectroscopic observations were then conducted with integration times ranging from 12 to 20 hours, to reach a Lyalpha flux limit of approximately 1-3x 10-18 erg/s/cm^2 at 3sigma. For about 40% of the galaxies we could determine a spectroscopic redshift, mainly through the detection of a single emission line that we interpret as Lyalpha emission, or for some of the brightest objects (H160< 25.5) from the presence of faint continuum and sharp drop that we interpret as a Lyman break. In this paper we present the redshifts and main properties of 65 newly confirmed high redshift galaxies. Adding previous proprietary and archival data we assemble a sample of ~260 galaxies that we use to explore the evolution of the Lyalpha fraction in Lyman break galaxies and the change in the shape of the emission line between z~6 and z~7. We also discuss the accuracy of the CANDELS photometric redshifts in this redshift range.
dc.description.sponsorshipSTFC ERC
dc.identifier.doi10.17863/CAM.33981
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286674
dc.publisherEDP Sciences
dc.publisher.urlhttp://dx.doi.org/10.1051/0004-6361/201732465
dc.subjectgalaxies: high-redshift
dc.subjectgalaxies: distances and redshifts
dc.subjectdark ages
dc.subjectreionization
dc.subjectfirst stars
dc.titleCANDELSz7: A large spectroscopic survey of CANDELS galaxies in the reionization epoch
dc.typeArticle
dcterms.dateAccepted2018-08-03
prism.publicationDate2018
prism.publicationNameAstronomy and Astrophysics
prism.volume619
pubs.funder-project-idScience and Technology Facilities Council (ST/M001172/1)
pubs.funder-project-idEuropean Research Council (695671)
rioxxterms.licenseref.startdate2018-11-01
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1051/0004-6361/201732465
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