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 μm

Autor: Itziar Aretxaga, Duncan Farrah, David L. Clements, James E. Geach, Scott Chapman, P. van der Werf, Rob Ivison, James Dunlop, Michał J. Michałowski, Mark Birkinshaw, Edward L. Chapin, Jorge A. Zavala, T. Jenness, David H. Hughes, Julian M Simpson, M. Spaans, E. I. Robson, Chian-Chou Chen, Douglas Scott
Přispěvatelé: Astronomy
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Hubble Deep Field
AZTEC MILLIMETER SURVEY
FOS: Physical sciences
Astrophysics
TO-FIR ANALYSIS
Astronomy & Astrophysics
01 natural sciences
law.invention
SPITZER/IRAC SOURCES
Telescope
Extended Groth Strip
law
galaxies: high-redshift
Cosmic infrared background
galaxies [submillimetre]
0103 physical sciences
STAR-FORMING GALAXIES
14. Life underwater
SOURCE CATALOG
010303 astronomy & astrophysics
evolution [galaxies]
James Clerk Maxwell Telescope
Physics
DEGREE EXTRAGALACTIC SURVEY
Science & Technology
010308 nuclear & particles physics
Astronomy
high redshift [galaxies]
Astronomy and Astrophysics
SMA OBSERVATIONS
Redshift survey
Astrophysics - Astrophysics of Galaxies
observations [cosmology]
Galaxy
Redshift
0201 Astronomical And Space Sciences
FAINT SUBMILLIMETER GALAXIES
13. Climate action
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
cosmology: observations
Physical Sciences
LENSING CLUSTERS
P(D) FLUCTUATION ANALYSIS
galaxies: evolution
submillimetre: galaxies
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711)
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711), 464(3), 3369-3384
Monthly Notices of the Royal Astronomical Society, 464(3), 3369-3384. Oxford University Press
Zavala, J A, Aretxaga, I, Geach, J E, Hughes, D H, Birkinshaw, M, Chapin, E, Chapman, S, Chen, C-C, Clements, D L, Dunlop, J S, Farrah, D, Ivison, R J, Jenness, T, Michałowski, M J, Robson, E I, Scott, D, Simpson, J, Spaans, M & Werf, P V D 2017, ' 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 ', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 3, pp. 3369-3384 . https://doi.org/10.1093/mnras/stw2630
ISSN: 0035-8711
DOI: 10.1093/mnras/stw2630
Popis: We present deep observations at 450 um and 850 um in the Extended Groth Strip field taken with the SCUBA-2 camera mounted on the James Clerk Maxwell Telescope as part of the deep SCUBA-2 Cosmology Legacy Survey (S2CLS), achieving a central instrumental depth of $��_{450}=1.2$ mJy/beam and $��_{850}=0.2$ mJy/beam. We detect 57 sources at 450 um and 90 at 850 um with S/N > 3.5 over ~70 sq. arcmin. From these detections we derive the number counts at flux densities $S_{450}>4.0$ mJy and $S_{850}>0.9$ mJy, which represent the deepest number counts at these wavelengths derived using directly extracted sources from only blank-field observations with a single-dish telescope. Our measurements smoothly connect the gap between previous shallower blank-field single-dish observations and deep interferometric ALMA results. We estimate the contribution of our SCUBA-2 detected galaxies to the cosmic infrared background (CIB), as well as the contribution of 24 um-selected galaxies through a stacking technique, which add a total of $0.26\pm0.03$ and $0.07\pm0.01$ MJy/sr, at 450 um and 850 um, respectively. These surface brightnesses correspond to $60\pm20$ and $50\pm20$ per cent of the total CIB measurements, where the errors are dominated by those of the total CIB. Using the photometric redshifts of the 24 um-selected sample and the redshift distributions of the submillimetre galaxies, we find that the redshift distribution of the recovered CIB is different at each wavelength, with a peak at $z\sim1$ for 450 um and at $z\sim2$ for 850um, consistent with previous observations and theoretical models.
Accepted for publication in MNRAS
Databáze: OpenAIRE
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