Volume 600, April 2017
|Number of page(s)||11|
|Section||Catalogs and data|
|Published online||10 April 2017|
The VIMOS Ultra Deep Survey first data release: Spectra and spectroscopic redshifts of 698 objects up to zspec ~ 6 in CANDELS⋆,⋆⋆
1 Aix Marseille Univ., CNRS, LAM, Laboratoire d’Astrophysique de Marseille, Marseille, France
2 Geneva Observatory, University of Geneva, ch. des Maillettes 51, 1290 Versoix, Switzerland
3 Institut de Recherche en Astrophysique et Planétologie – IRAP, CNRS, Université de Toulouse, UPS-OMP, 14 avenue E. Belin, 31400 Toulouse, France
4 INAF–Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
5 Instituto de Fisica y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile
6 INAF–IASF Milano, via Bassini 15, 20133 Milano, Italy
7 INAF–Osservatorio Astronomico di Roma, via di Frascati 33, 00040 Monte Porzio Catone, Italy
8 University of Bologna, Department of Physics and Astronomy (DIFA), V.le Berti Pichat, 6/2 – 40127 Bologna, Italy
9 Astronomy Department, University of Massachusetts, Amherst, MA 01003, USA
10 Department of Astronomy, University of Geneva ch. d’Écogia 16, 1290 Versoix, Switzerland
11 INAF–IASF Bologna, via Gobetti 101, 40129 Bologna, Italy
12 Infrared Processing and Analysis Center, California Institute for Technology, Pasadena, CA 91125, USA
13 Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre et Marie Curie, 98bis boulevard Arago, 75014 Paris, France
14 SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, UK
15 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
16 Centro de Estudios de Física del Cosmos de Aragón, 44001 Teruel, Spain
17 Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, 85741 Garching bei München, Germany
18 Cahill Center for Astronomy and Astrophysics, California Institute for Technology, Pasadena, CA 91125, USA
19 Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho 2-5, 790-8577 Matsuyama, Japan
20 National Centre for Nuclear Research, Astrophysics Division, Hoza 69, 00-681 Warszawa, Poland
⋆⋆⋆ Corresponding author: L. A. M. Tasca, e-mail: firstname.lastname@example.org
Received: 15 December 2015
Accepted: 26 May 2016
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.
Key words: galaxies: distances and redshifts / galaxies: high-redshift / cosmology: observations / surveys / catalogs
Based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Program 185.A–0791.
© ESO, 2017
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