Faint End of 1.3 mm Number Counts Revealed by ALMA

Abstract

We present the faint end of number counts at 1.3 mm (238 GHz) obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). Band 6 observations were carried out targeting 20 star-forming galaxies at z ~ 1.4 in the Subaru/XMM-Newton Deep Survey field. In the observations, we serendipitously detect 15 sources (>=3.8 sigma, S(1.3 mm) = 0.15-0.61 mJy) other than the targeted sources. We create number counts by using these `sub-mJy sources', which probe the faintest flux range among surveys at millimeter wavelengths. The number counts are consistent with (flux-scaled) number counts at 850 um and 870 um obtained with gravitational lensing clusters. The ALMA number counts agree well with model predictions, which suggest that these sub-mJy populations are more like `normal' star-forming galaxies than `classical' SMGs with intense star-forming activity. In this flux range, ~80% of the extragalactic background light at 1.3 mm is resolved into individual sources.

5 pages, 4 figures, Accepted for publication in the Astrophysical Journal Letters

References in corpus (11)

• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• SHARC-2 350 Micron Observations of Distant Submillimeter Selected Galaxies
• The Subaru/XMM-Newton Deep Survey (SXDS) - II. Optical Imaging and Photometric Catalogs
• An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South: High resolution 870um source counts
• A unified empirical model for infrared galaxy counts based on observed physical evolution of distant galaxies
• Submillimetre galaxies in a hierarchical universe: number counts, redshift distribution, and implications for the IMF
• Probing the submillimetre number counts at f(850um) < 2mJy
• The SCUBA HAlf Degree Extragalactic Survey (SHADES) -- VI. 350 micron mapping of submillimetre galaxies
• An AzTEC 1.1 mm Survey of the GOODS-N Field I: Maps, Catalogue, and Source Statistics
• Empirical predictions for (sub-)millimeter line and continuum deep fields
• Sub-millimetre galaxies in cosmological hydrodynamic simulations: Source number counts and the spatial clustering

Cited by in corpus (60)

• Dusty Star-Forming Galaxies at High Redshift
• High-redshift star formation in the ALMA era
• The ALPINE-ALMA [CII] Survey: The nature, luminosity function and star formation history of dusty galaxies up to z~6
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the bright-end of the sub-millimeter number counts
• The impact of clustering and angular resolution on far-infrared and millimeter continuum observations
• ALMA spectroscopic survey in the Hubble Ultra Deep Field: Continuum number counts, resolved 1.2-mm extragalactic background, and properties of the faintest dusty star forming galaxies
• On the dust temperatures of high redshift galaxies
• ALMA Census of Faint 1.2 mm Sources Down to ~0.02 mJy: Extragalactic Background Light and Dust-Poor High-z Galaxies
• A Complete ALMA Map of the Fomalhaut Debris Disk
• ALMACAL I: First dual-band number counts from a deep and wide ALMA submm survey, free from cosmic variance
• Alma Twenty-six Arcmin^2 Survey Of Goods-s At One-millimeter (asagao): Source Catalog And Number Counts
• ALMA constraints on the faint millimetre source number counts and their contribution to the cosmic infrared background
• ALMA Deep Field in SSA22: Source Catalog and Number Counts
• The ALMA Spectroscopic Survey in the HUDF: CO emission lines and 3 mm continuum sources
• Simulated observations of sub-millimetre galaxies: the impact of single-dish resolution and field variance
• GOODS-ALMA 2.0: Source catalog, number counts, and prevailing compact sizes in 1.1 mm galaxies
• The ALMA Spectroscopic Survey in the HUDF: Deep 1.2 mm continuum number counts
• Mapping Obscuration to Reionization with ALMA (MORA): 2mm Efficiently Selects the Highest-Redshift Obscured Galaxies
• The nature of sub-millimeter and highly star-forming galaxies in the EAGLE simulation
• Faint Submillimeter Galaxies Revealed by Multifield Deep ALMA Observations: Number Counts, Spatial Clustering, and A Dark Submillimeter Line Emitter
• SXDF-ALMA 2 arcmin${}^2$ Deep Survey: 1.1-mm Number Counts
• ALMA observations of fragmentation, sub-structure, and protostars in high-mass starless clump candidates
• ALMA Lensing Cluster Survey: $HST$ and $Spitzer$ Photometry of 33 Lensed Fields Built with CHArGE
• The SCUBA-2 Cosmology Legacy Survey: The EGS deep field I - Deep number counts and the redshift distribution of the recovered Cosmic Infrared Background at 450 and 850 um
• SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-End Counts at 450 um
• GOODS-ALMA: 1.1 mm galaxy survey - I. Source catalogue and optically dark galaxies
• GOODS-ALMA: The slow downfall of star-formation in $z$ = 2-3 massive galaxies
• Measurement of CIB power spectra over large sky areas from Planck HFI maps
• Two gamma-ray bursts from dusty regions with little molecular gas
• Faint Submillimeter Galaxies identified through their optical/near-infrared colours I: spatial clustering and halo masses
• Stacking of large interferometric data sets in the image- and uv-domain -- a comparative study
• The Hawaii SCUBA-2 Lensing Cluster Survey: Number Counts and Submillimeter Flux Ratios
• Constraining the volume density of Dusty Star-Forming Galaxies through the first 3mm Number Counts from ALMA
• Properties of Submillimeter Galaxies in a Semi-analytic Model using the "Count Matching" Approach: Application to the ECDF-S
• Submillimetre galaxies in cosmological hydrodynamical simulations -- an opportunity for constraining feedback models
• ALMA Deep Field in SSA22: Survey Design and Source Catalog of a 20 arcmin^2 Survey at 1.1mm
• An extended Herschel drop-out source in the center of AS1063, a 'normal' dusty galaxy at z=6.1 or SZ substructures?
• The ALMA Spectroscopic Survey in the HUDF: A model to explain observed 1.1 and 0.85 millimeter dust continuum number counts
• The evolution of the UV-to-mm extragalactic background light: evidence for a top-heavy initial mass function?
• Overdensities of SMGs around WISE-selected, ultra-luminous, high-redshift AGN
• Using ALMA to resolve the nature of the early star-forming large-scale structure PLCK G073.4-57.5
• GOODS-ALMA: Using IRAC and VLA to probe fainter millimeter galaxies
• The Clustering Evolution of Dusty Star-Forming Galaxies
• ALMACAL IX: multi-band ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background
• Optical-Infrared Properties of Faint 1.3 mm Sources Detected with ALMA
• SXDF-ALMA 2 Arcmin^2 Deep Survey: Resolving and Characterizing the Infrared Extragalactic Background Light Down to 0.5 mJy
• First-generation Science Cases for Ground-based Terahertz Telescopes
• Is a top-heavy initial mass function needed to reproduce the submillimeter galaxy number counts?
• SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects
• ALMA 26 arcmin${}^2$ survey of GOODS-S at one-millimeter (ASAGAO): millimeter properties of stellar mass selected galaxies
• ASW${}^2$DF: Census of the obscured star formation in a galaxy cluster in formation at $z=2.2$
• Anatomy of a blazar in the (sub-)millimeter: ALMA Observations of PKS 0521-365
• Multi-band Optical and Near-infrared Properties of Faint Submillimeter Galaxies with Serendipitous ALMA Detections
• Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
• Estimating the confusion noise for the Millimetron space telescope
• Extremely-bright submillimeter galaxies beyond the Lupus-I star-forming region
• Modeling submillimeter galaxies in cosmological simulations: Contribution to the cosmic star formation density and predictions for future surveys
• A mock redshift catalogue of the dusty star-forming galaxy population with intrinsic clustering and lensing for deep millimetre surveys
• Confusion noise due to clustered extragalactic point sources. Application of logarithmic cumulants for parameter estimation
• SXDF-UDS-CANDELS-ALMA 1.5 arcmin${}^2$ deep survey