The VIMOS Ultra Deep Survey first data release: Spectra and spectroscopic redshifts of 698 objects up to zspec ~ 6 in CANDELS

Journal
Date Issued
2017
Author(s)
Tasca, L. A. M.
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Le Fèvre, O.
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Ribeiro, B.
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Thomas, R.
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Moreau, C.
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Cassata, P.
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Le Brun, V.
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Lemaux, B. C.
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Maccagni, D.
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•
Schaerer, D.
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•
Zamorani, G.
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•
Amorin, R.
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•
•
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Cimatti, A.
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Durkalec, A.
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Giavalisco, M.
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Hathi, N. P.
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Ilbert, O.
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Paltani, S.
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Pforr, J.
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Sommariva, V.
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Talia, M.
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Tresse, L.
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Capak, P.
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Charlot, S.
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Contini, T.
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Dunlop, J.
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Fotopoulou, S.
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Guaita, L.
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Koekemoer, A.
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López-Sanjuan, C.
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Mellier, Y.
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Salvato, M.
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Scoville, N.
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Taniguchi, Y.
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Wang, P. W.
DOI
Abstract
This paper describes the first data release (DR1) of the VIMOS Ultra Deep Survey (VUDS). The VUDS-DR1 is the release of all low-resolution spectroscopic data obtained in 276.9 arcmin2 of the CANDELS-COSMOS and CANDELS-ECDFS survey areas, including accurate spectroscopic redshifts zspec and individual spectra obtained with VIMOS on the ESO-VLT. A total of 698 objects have a measured redshift, with 677 galaxies, two type-I AGN, and a small number of 19 contaminating stars. The targets of the spectroscopic survey are selected primarily on the basis of their photometric redshifts to ensure a broad population coverage. About 500 galaxies have zspec > 2, 48of which have zspec > 4; the highest reliable redshifts reach beyond zspec = 6. This data set approximately doubles the number of galaxies with spectroscopic redshifts at z > 3 in these fields. We discuss the general properties of the VUDS-DR1 sample in terms of the spectroscopic redshift distribution, the distribution of Lyman-α equivalent widths, and physical properties including stellar masses M⋆ and star formation rates derived from spectral energy distribution fitting with the knowledge of zspec. We highlight the properties of the most massive star-forming galaxies, noting the wide range in spectral properties, with Lyman-α in emission or in absorption, and in imaging properties with compact, multi-component, or pair morphologies. We present the catalogue database and data products. All VUDS-DR1 data are publicly available and can be retrieved from a dedicated query-based database. Future VUDS data releases will follow this VUDS-DR1 to give access to the spectra and associated measurement of 8000 objects in the full 1 square degree of the VUDS survey. Based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Program 185.A-0791. http://cesam.lam.fr/vuds
Volume
600
Start page
A110
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
2017A&A...600A.110T
Rights
open.access
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