Licking the plate: dusty star-forming galaxies buried in the ALMA calibration data

Abstract

Deep, unbiased surveys are essential to decipher the cosmic evolution of galaxies. The submillimetre (submm) and millimetre (mm) windows complement the UV/optical waveband and are key to revealing the cold and dusty Universe. Traditional ways of conducting deep surveys resort to either lensed fields or target small areas for ultra-long integrations. These surveys have greatly advanced our understanding of dusty star-forming galaxies (DSFGs), but are susceptible to lensing uncertainties and cosmic variance and will be expensive to expand. Here, we summarise our recent multi-wavelength survey of DSFGs in the vicinity of ALMA's calibrators: the ALMACAL survey. These fields have accumulated many hundreds of hours of on-source time, reaching depths and effective areas that are competitive with bespoke cosmological surveys. We summarise the multi-wavelength number counts from ALMACAL and the resolved fraction of the Cosmic Infrared Background (CIB) from submm to mm wavelengths. Meanwhile, combining all available ALMA observations in each field results in impressive frequency coverage, which often yields the redshifts of these DSFGs. The ALMACAL survey has demonstrated the scientific value of calibration scans for all submm/mm and radio telescopes, existing and planned.

6 pages, 3 figures, published by Proceedings of mm Universe 2023, EPJ Web of conferences, EDP Sciences

References in corpus (13)

• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• The Evolution of the Star-forming Interstellar Medium across Cosmic Time
• Dust in the reionization era: ALMA observations of a $z$=8.38 Galaxy
• The Cosmic Baryon and Metal Cycles
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Survey Description
• The ALMA REBELS Survey: Dust Continuum Detections at z > 6.5
• The ALMA Spectroscopic Survey in the HUDF: Deep 1.2 mm continuum number counts
• HerMES: The Rest-Frame UV Emission and A Lensing Model for the z=6.34 Luminous Dusty Starburst Galaxy HFLS3
• Determination of the Cosmic Infrared Background from COBE/FIRAS and Planck HFI Observations
• ALMACAL IX: multi-band ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background
• ALMACAL VIII: A pilot survey for untargeted extragalactic CO emission lines in deep ALMA calibration data
• ALMACAL VII: First Interferometric Number Counts at 650 $\mu$m
• ALMACAL. XI. Over-densities as signposts to proto-clusters? A cautionary tale