z-GAL -- A NOEMA spectroscopic redshift survey of bright Herschel galaxies: [I] Overview

Abstract

(Abridged) Using the IRAM NOEMA interferometer, we measures the redshifts of 126 bright galaxies detected in the Herschel H-ATLAS, HeLMS, and HerS surveys. We report reliable spectroscopic redshifts for a total of 124 of the Herschel-selected galaxies. The redshifts are estimated from scans of the 3 and 2-mm bands (and, in one case, the 1-mm band) and are based on the detection of at least two emission lines. Together with the Pilot Programme (Neri et al. 2020), including spectroscopic redshifts of 11 sources, our survey has derived precise redshifts for 135 bright Herschel-selected galaxies, making it the largest sample of high-z galaxies with robust redshifts to date. Most emission lines detected are from 12CO (mainly from J=2-1 to 5-4), with some sources seen in [CI] and H2O emission lines. The spectroscopic redshifts are in the range 0.8<z<6.55 with a median value of z=2.56 +/- 0.10. The line widths of the sources are large, with a mean value for the full width at half maximum Delta(V) of 590 +/- 25 km/s and with 35% of the sources having widths of 700 km/s < Delta(V) < 1800 km/s. Most of the sources are unresolved or barely resolved on scales of 2 to 3 arcsec (or linear sizes of 15-25 kpc, unlensed). Some fields reveal double or multiple sources and, in some cases, sources at different redshifts. Taking these sources into account, there are, in total, 165 individual sources with robust spectroscopic redshifts, including lensed galaxies, binary systems, and over-densities. We present an overview of the z-GAL survey and provide the observed properties of the emission lines, the derived spectroscopic redshifts, and an atlas of the entire sample. The data presented here will serve as a foundation for the other z-GAL papers in this series reporting on the dust emission, the molecular and atomic gas properties, and a detailed analysis of the nature of the sources.

arXiv commentAccepted for publication on A&A; 63 pages

References in corpus (82)

• The Global Schmidt Law in Star Forming Galaxies
• Cosmic Star Formation History
• Unveiling Dust-enshrouded Star Formation in the Early Universe: a Sub-mm Survey of the Hubble Deep Field
• A Deep Sub-millimeter Survey of Lensing Clusters: A New Window on Galaxy Formation and Evolution
• A Redshift Survey of the Submillimeter Galaxy Population
• GOODS-Herschel: an infrared main sequence for star-forming galaxies
• Cool Gas in High Redshift Galaxies
• The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies
• Molecular Gas at High Redshift
• Submillimeter Galaxies
• Dusty Star-Forming Galaxies at High Redshift
• The Herschel Multi-tiered Extragalactic Survey: HerMES
• Submillimeter Galaxies at z~2: Evidence for Major Mergers & Constraints on Lifetimes, IMF and CO-H2 Conversion Factor
• A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34
• The Herschel ATLAS
• PACS Evolutionary Probe (PEP) - A Herschel Key Program
• A survey of molecular gas in luminous sub-millimetre galaxies
• The Detection of a Population of Submillimeter-Bright, Strongly-Lensed Galaxies
• The LABOCA Survey of the Extended Chandra Deep Field South
• Intense Star Formation within Resolved Compact Regions in a Galaxy at z=2.3
• Extragalactic millimeter-wave sources in South Pole Telescope survey data: source counts, catalog, and statistics for an 87 square-degree field
• Black hole accretion and star formation as drivers of gas excitation and chemistry in Mrk231
• ALMA redshifts of millimeter-selected galaxies from the SPT survey: The redshift distribution of dusty star-forming galaxies
• The Intense Starburst HDF850.1 in a Galaxy Overdensity at z=5.2 in the Hubble Deep Field
• Gravitational Lens Models Based on Submillimeter Array Imaging of Herschel-selected Strongly Lensed Sub-millimeter Galaxies at z>1.5
• ALMA Imaging and Gravitational Lens Models of South Pole Telescope-Selected Dusty, Star-Forming Galaxies at High Redshifts
• Herschel and SCUBA-2 imaging and spectroscopy of a bright, lensed submillimetre galaxy at z = 2.3
• The Herschel-ATLAS Data Release 1 Paper I: Maps, Catalogues and Number Counts
• High-redshift star formation in the ALMA era
• The Formation of Submillimetre-Bright Galaxies from Gas Infall over a Billion Years
• Herschel-ATLAS: a binary HyLIRG pinpointing a cluster of starbursting proto-ellipticals
• Gas and dust in a submillimeter galaxy at z = 4.24 from the Herschel ATLAS
• HerMES: Candidate Gravitationally Lensed Galaxies and Lensing Statistics at Submillimeter Wavelengths
• A Redshift Survey of Herschel Far-Infrared Selected Starbursts and Implications for Obscured Star Formation
• A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z>2
• The rapid assembly of an elliptical galaxy of 400 billion solar masses at a redshift of 2.3
• The redshift distribution of dusty star forming galaxies from the SPT survey
• The Herschel-ATLAS: a sample of 500μm-selected lensed galaxies over 600 square degrees
• The Evolution of the Baryons Associated with Galaxies Averaged over Cosmic Time and Space
• Blind detections of CO J = 1--0 in 11 H-ATLAS galaxies at z = 2.1--3.5 with the GBT/Zpectrometer
• An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South: Spectroscopic redshifts
• The Complete Redshift Distribution of Dusty Star-forming Galaxies from the SPT-SZ Survey
• Molecular gas in the Herschel-selected strongly lensed submillimeter galaxies at z~2-4 as probed by multi-J CO lines
• Gas fraction and star formation efficiency at z < 1.0
• The space density of luminous dusty star-forming galaxies at $z>4$: SCUBA-2 and LABOCA imaging of ultrared galaxies from $Herschel$-ATLAS
• Planck's Dusty GEMS: Gravitationally lensed high-redshift galaxies discovered with the Planck survey
• HerMES: ALMA Imaging of Herschel-selected Dusty Star-forming Galaxies
• An ALMA/NOEMA survey of the molecular gas properties of high-redshift star-forming galaxies
• Discovery of four apparently cold dusty galaxies at z=3.62-5.85 in the COSMOS field: direct evidence of CMB impact on high-redshift galaxy observables
• Witnessing the birth of the red sequence: ALMA high-resolution imaging of [CII] and dust in two interacting ultra-red starbursts at z = 4.425
• Turbulent Gas in Lensed Planck-selected Starbursts at redshifts 1-3.5
• Dust temperture and the submillimetre-radio flux density ratio as a redshift indicator for distant galaxies
• Galaxy Evolution and Star Formation Efficiency at 0.2 < z < 0.6
• Rise of the Titans: A Dusty, Hyper-Luminous "870 micron Riser" Galaxy at z~6
• Candidate Gravitationally Lensed Dusty Star-forming Galaxies in the Herschel Wide Area Surveys
• Early Science with the Large Millimeter Telescope: Observations of Extremely Luminous High-z Sources Identified by Planck
• Measurements of CO redshifts with Z-Spec for lensed submillimeter galaxies discovered in the H-ATLAS survey
• The most distant, luminous, dusty star-forming galaxies: redshifts from NOEMA and ALMA spectral scans
• Molecular Gas in Lensed z>2 Quasar Host Galaxies and the Star Formation Law for Galaxies with Luminous Active Galactic Nuclei
• The influence of wavelength, flux, and lensing selection effects on the redshift distribution of dusty, star-forming galaxies
• The Herschel Bright Sources (HerBS): Sample definition and SCUBA-2 observations
• H-ATLAS: estimating redshifts of Herschel sources from sub-mm fluxes
• NOEMA redshift measurements of bright Herschel galaxies
• An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS field (AS2COSPEC): Survey Description and First Results
• Ultra-bright CO and [CI] emission in a lensed z=2.04 submillimeter galaxy with extreme molecular gas properties
• Molecular gas mass functions of normal star forming galaxies since z~3
• Early Science with the Large Millimeter Telescope: Observations of dust continuum and CO emission lines of cluster-lensed submillimetre galaxies at z=2.0-4.7
• Close-up view of a luminous star-forming galaxy at z=2.95
• The Bright Extragalactic ALMA Redshift Survey (BEARS) I: redshifts of bright gravitationally-lensed galaxies from the Herschel ATLAS
• VLA Legacy Survey of Molecular Gas in Massive Star-forming Galaxies at High Redshift
• The Bright Extragalactic ALMA Redshift Survey (BEARS) II: Millimetre photometry of gravitational lens candidates
• A search for the lenses in the Herschel Bright Sources (HerBS) Sample
• The bright end of the infrared luminosity functions and the abundance of hyperluminous infrared galaxies
• IRAM 30m-EMIR Redshift Search of z = 3-4 Lensed Dusty Starbursts selected from the HerBS sample
• z-GAL -- A NOEMA spectroscopic redshift survey of bright Herschel galaxies: [II] Dust properties
• The GADOT Galaxy Survey: Dense Gas and Feedback in Herschel-Selected Starburst Galaxies at Redshifts 2 to 6
• Hyperluminous starburst gives up its secrets
• Resolved CO(1-0) emission and gas properties in luminous dusty star forming galaxies at z=2-4
• Modelling high-resolution ALMA observations of strongly lensed dustystar forming galaxies detected by Herschel
• Herschel-ATLAS Data Release III: Near-infrared counterparts in the South Galactic Pole field -- Another 100,000 submillimetre galaxies
• High-z Sudoku: A diagnostic tool for identifying robust (sub)mm redshifts
• Photometric Redshifts of Submillimeter Galaxies

Cited by in corpus (12)

• z-GAL -- A NOEMA spectroscopic redshift survey of bright Herschel galaxies: [II] Dust properties
• A photo-z cautionary tale: Redshift confirmation of COSBO-7 at z=2.625
• z-GAL -- A NOEMA spectroscopic redshift survey of bright Herschel galaxies: [III] Physical properties
• The COSMOS-Web ring: Spectroscopic confirmation of the background source at z = 5.1
• CO(1--0) imaging reveals 10-kiloparsec molecular gas reservoirs around star-forming galaxies at high redshift
• Vz-GAL: Probing Cold Molecular Gas in Dusty Star-forming Galaxies at z=1-6
• An upper limit to differential magnification effects in strongly gravitationally lensed galaxies
• Do Unusually Cold Starburst Galaxies Exist? A Case Study
• HerS-3: An Exceptional Einstein Cross Reveals a Massive Dark Matter Halo
• Tight correlation of star formation with [Ci] and CO lines across cosmic time
• Hiding behind a curtain of dust: Gas and dust properties of an ultra-luminous strongly-lensed z = 3.75 galaxy behind the Milky Way disk
• The Photometric Analysis of the Environment Around Two Dusty Star-Forming Galaxies at $z\sim 2$