Herschel-ATLAS: towards a sample of ~1000 strongly-lensed galaxies

Abstract

While the selection of strongly lensed galaxies with 500μm flux density S_500>100 mJy has proven to be rather straightforward (Negrello et al. 2010), for many applications it is important to analyze samples larger than the ones obtained when confining ourselves to such a bright limit. Moreover, only by probing to fainter flux densities is possible to exploit strong lensing to investigate the bulk of the high-z star-forming galaxy population. We describe HALOS (the Herschel-ATLAS Lensed Objects Selection), a method for efficiently selecting fainter candidate strongly lensed galaxies, reaching a surface density of ~1.5-2 deg^-2, i.e. a factor of about 4 to 6 higher than that at the 100 mJy flux limit. HALOS will allow the selection of up to ~1000 candidate strongly lensed galaxies (with amplifications μ>2) over the full H-ATLAS survey area. Applying HALOS to the H-ATLAS Science Demonstration Phase field (~14.4 deg^2) we find 31 candidate strongly lensed galaxies, whose candidate lenses are identified in the VIKING near-infrared catalog. Using the available information on candidate sources and candidate lenses we tentatively estimate a ~72% purity of the sample. The redshift distribution of the candidate lensed sources is close to that reported for most previous surveys for lensed galaxies, while that of candidate lenses extends to substantially higher redshifts than found in the other surveys. The counts of candidate strongly lensed galaxies are also in good agreement with model predictions (Lapi et al. 2011). Even though a key ingredient of the method is the deep near-infrared VIKING photometry, we show that H-ATLAS data alone allow the selection of a similarly deep sample of candidate strongly lensed galaxies with an efficiency close to 50%; a slightly lower surface density (~1.45 deg^-2) can be reached with a ~70% efficiency.

36 pages, 12 figures, 1 table. Accepted by ApJ

References in corpus (11)

• The Detection of a Population of Submillimeter-Bright, Strongly-Lensed Galaxies
• Intense Star Formation within Resolved Compact Regions in a Galaxy at z=2.3
• The dramatic size evolution of elliptical galaxies and the quasar feedback
• Astrophysical and Cosmological Information from Large-scale sub-mm Surveys of Extragalactic Sources
• Gravitational Lens Models Based on Submillimeter Array Imaging of Herschel-selected Strongly Lensed Sub-millimeter Galaxies at z>1.5
• Herschel-ATLAS Galaxy Counts and High Redshift Luminosity Functions: The Formation of Massive Early Type Galaxies
• The Sloan Digital Sky Survey Quasar Lens Search. I. Candidate Selection Algorithm
• First catalog of strong lens candidates in the COSMOS field
• The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
• Gravitational lenses and lens candidates identified from the COSMOS field
• The Star-Formation Histories of z~2 DOGs and SMGs

Cited by in corpus (73)

• A unified empirical model for infrared galaxy counts based on observed physical evolution of distant galaxies
• The SL2S Galaxy-scale Lens Sample. IV. The dependence of the total mass density profile of early-type galaxies on redshift, stellar mass, and size
• Gravitational Lens Models Based on Submillimeter Array Imaging of Herschel-selected Strongly Lensed Sub-millimeter Galaxies at z>1.5
• The Herschel-ATLAS Data Release 1 Paper I: Maps, Catalogues and Number Counts
• HerMES: Candidate Gravitationally Lensed Galaxies and Lensing Statistics at Submillimeter Wavelengths
• The Herschel-ATLAS: a sample of 500μm-selected lensed galaxies over 600 square degrees
• Blind detections of CO J = 1--0 in 11 H-ATLAS galaxies at z = 2.1--3.5 with the GBT/Zpectrometer
• A hybrid model for the evolution of galaxies and Active Galactic Nuclei in the infrared
• RingFinder: automated detection of galaxy-scale gravitational lenses in ground-based multi-filter imaging data
• The stellar and dark matter distributions in elliptical galaxies from the ensemble of strong gravitational lenses
• The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift
• A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy
• Strong biases in infrared-selected gravitational lenses
• Far-infrared surveys of galaxy evolution
• Cross-correlation between the CMB lensing potential measured by Planck and high-z sub-mm galaxies detected by the Herschel-ATLAS survey
• Candidate Gravitationally Lensed Dusty Star-forming Galaxies in the Herschel Wide Area Surveys
• Effective Models for Statistical Studies of Galaxy-Scale Gravitational Lensing
• Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionised gas
• The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky
• H-ATLAS: estimating redshifts of Herschel sources from sub-mm fluxes
• The Herschel Bright Sources (HerBS): Sample definition and SCUBA-2 observations
• A Detailed Gravitational Lens Model Based on Submillimeter Array and Keck Adaptive Optics Imaging of a Herschel-ATLAS Sub-millimeter Galaxy at z=4.243
• Herschel-ATLAS: Modelling the first strong gravitational lenses
• The Quest for Dusty Star-forming Galaxies at High Redshift z>4
• Toward a tomographic analysis of the cross-correlation between Planck CMB lensing and H-ATLAS galaxies
• Up to 100,000 reliable strong gravitational lenses in future dark energy experiments
• GAMA/H-ATLAS: Linking the Properties of Sub-mm Detected and Undetected Early-Type Galaxies: I. z$\le$0.06 Sample
• Herschel-ATLAS: Planck sources in the Phase 1 fields
• Herschel-ATLAS/GAMA: SDSS cross-correlation induced by weak lensing
• The PCA Lens-Finder: application to CFHTLS
• H-ATLAS/GAMA: Magnification Bias Tomography. Astrophysical constraints above $\sim 1$ arcmin
• The Bright Extragalactic ALMA Redshift Survey (BEARS) II: Millimetre photometry of gravitational lens candidates
• Exploring the early dust-obscured phase of galaxy formation with blind mid-/far-IR spectroscopic surveys
• Bright Extragalactic ALMA Redshift Survey (BEARS) III: Detailed study of emission lines from 71 Herschel targets
• A search for the lenses in the Herschel Bright Sources (HerBS) Sample
• Consequences of the lack of azimuthal freedom in the modeling of lensing galaxies
• IRAM 30m-EMIR Redshift Search of z = 3-4 Lensed Dusty Starbursts selected from the HerBS sample
• ALMA observations of lensed Herschel sources : Testing the dark-matter halo paradigm
• Infrared luminosity functions and dust mass functions in the EAGLE simulation
• Forecasts on the contamination induced by unresolved point sources in primordial non-Gaussianity beyond Planck
• Practical Cosmology with Lenses
• Cosmology with the sub-millimetre galaxies magnification bias: Tomographic Analysis
• PASSAGES: The Large Millimeter Telescope and ALMA Observations of Extremely Luminous High Redshift Galaxies Identified by the Planck
• Distortion of the luminosity function of high-redshift galaxies by gravitational lensing
• Detailed modelling of a large sample of Herschel sources in the Lockman Hole: identification of cold dust and of lensing candidates through their anomalous SEDs
• Cosmological constraints with the sub-millimetre galaxies Magnification Bias after large scale bias corrections
• QSOs sigposting cluster size halos as gravitational lenses: halo mass, projected mass density profile and concentration at $z\sim 0.7$
• Cosmology with the submillimetre galaxies magnification bias: Proof of concept
• Colour matters: the effects of lensing on the positional offsets between optical and submillimetre galaxies in Herschel-ATLAS
• Herschel-ATLAS Data Release III: Near-infrared counterparts in the South Galactic Pole field -- Another 100,000 submillimetre galaxies
• Finding bright $z\ge 6.6$ Lyman-$\alpha$ emitters with lensing: prospects for Euclid
• SGAS 143845.1+145407: A Big, Cool Starburst at Redshift 0.816
• Submm/mm Galaxy Counterpart Identification Using a Characteristic Density Distribution
• SHALOS: Statistical Herschel-ATLAS Lensed Objects Selection
• A search for candidate strongly-lensed dusty galaxies in the Planck satellite catalogues
• The eROSITA Final Equatorial-Depth Survey (eFEDS): An X-ray bright, extremely luminous infrared galaxy at z = 1.87
• High-z dusty star-forming galaxies: a top-heavy initial mass function?
• Lensed CMB power spectrum biases from masking extragalactic sources
• Galaxy-scale gravitational lens candidates from the Hyper Suprime-Cam imaging survey and the Galaxy And Mass Assembly spectroscopic survey
• Quasi-stellar objects and galaxy mass density profiles derived using the submillimetre galaxies magnification bias
• The Herschel Virgo Cluster Survey. XV. Planck submillimetre sources in the Virgo Cluster
• Multi-wavelength lens reconstruction of a $\text{Planck}$ $\&$ $\text{Herschel}$-detected star-bursting galaxy
• Gravitational lensing effects on sub-millimetre galaxy counts
• Cross-correlation of POLARBEAR CMB Polarization Lensing with High-$z$ Sub-mm Herschel-ATLAS galaxies
• Galaxy cluster mass density profile derived using the submillimetre galaxies magnification bias
• Methodological refinement of the submillimeter galaxy magnification bias. II. Cosmological analysis with tomography
• Extremely-bright submillimeter galaxies beyond the Lupus-I star-forming region
• Multifrequency filter search for high redshift sources and lensing systems in Herschel-ATLAS
• Cosmic Insights from Galaxy Clusters: Exploring Magnification Bias on Sub-millimeter Galaxies
• Methodological refinement of the submillimeter galaxy cross-correlation function measurements and their uncertainty estimation
• Cosmic magnification on high-redshift submillimeter galaxies
• Strong Gravitational Lens Statistics using the Herschel-ATLAS
• Extragalactic astrophysics with next-generation CMB experiments