The bright extragalactic ALMA redshift survey (BEARS) – II. Millimetre photometry of gravitational lens candidates
Journal article, 2023
We present 101- and 151-GHz ALMA continuum images for 85 fields selected from Herschel observations that have 500-μm flux densities >80 mJy and 250–500-μm colours consistent with z > 2, most of which are expected to be gravitationally lensed or hyperluminous infrared galaxies. Approximately half of the Herschel 500-μm sources were resolved into multiple ALMA sources, but 11 of the 15 brightest 500-μm Herschel sources correspond to individual ALMA sources. For the 37 fields containing either a single source with a spectroscopic redshift or two sources with the same spectroscopic redshift, we examined the colour temperatures and dust emissivity indices. The colour temperatures only vary weakly with redshift and are statistically consistent with no redshift-dependent temperature variations, which generally corresponds to results from other samples selected in far-infrared, submillimetre, or millimetre bands but not to results from samples selected in optical or near-infrared bands. The dust emissivity indices, with very few exceptions, are largely consistent with a value of 2. We also compared spectroscopic redshifts to photometric redshifts based on spectral energy distribution templates designed for infrared-bright high-redshift galaxies. While the templates systematically underestimate the redshifts by ∼15 per cent, the inclusion of ALMA data decreases the scatter in the predicted redshifts by a factor of ∼2, illustrating the potential usefulness of these millimetre data for estimating photometric redshifts.
submillimetre: galaxies
galaxies: ISM
galaxies: high-redshift
infrared: galaxies
Author
G. J. Bendo
University of Manchester
S. Urquhart
Open University
S. Serjeant
Open University
Tom J.L.C. Bakx
National Astronomical Observatory of Japan
Nagoya University
Masato Hagimoto
Nagoya University
P. Cox
Institut d 'Astrophysique de Paris
R. Neri
Institut de Radioastronomie Millimétrique (IRAM)
M. Lehnert
École Normale Supérieure de Lyon
H. Dannerbauer
University of La Laguna
Instituto de Astrofísica de Canarias
A. Amvrosiadis
Durham University
P. Andreani
European Southern Observatory (ESO)
A. J. Baker
Rutgers University
University of the Western Cape
A. Beelen
Laboratoire d'Astrophysique de Marseille
S. Berta
Institut de Radioastronomie Millimétrique (IRAM)
E. Borsato
University of Padua
V. Buat
Laboratoire d'Astrophysique de Marseille
K. M. Butler
Leiden University
A. Cooray
University of California at Irvine (UCI)
G. De Zotti
Istituto nazionale di astrofisica (INAF)
L. Dunne
Cardiff University
S. Dye
University of Nottingham
S. Eales
Cardiff University
A. F.M. Enia
Istituto nazionale di astrofisica (INAF)
University of Bologna
Lulu Fan
University of Science and Technology of China
R. Gavazzi
Laboratoire d'Astrophysique de Marseille
Institut d 'Astrophysique de Paris
J. González-Nuevo
Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)
University of Oviedo
A. I. Harris
University of Maryland
C. N. Herrera
Institut de Radioastronomie Millimétrique (IRAM)
D. Hughes
National Institute of Astrophysics, Optics and Electronics
D. Ismail
Laboratoire d'Astrophysique de Marseille
B. M. Jones
University of Cologne
K. Kohno
University of Tokyo
Research Center for the Early Universe
M. Krips
Institut de Radioastronomie Millimétrique (IRAM)
Guilaine Lagache
Laboratoire d'Astrophysique de Marseille
L. Marchetti
Istituto nazionale di astrofisica (INAF)
University of Cape Town
M. Massardi
Istituto nazionale di astrofisica (INAF)
Scuola Internazionale Superiore di Studi Avanzati
H. Messias
Atacama Large Millimeter-submillimeter Array (ALMA)
European Southern Observatory Santiago
M. Negrello
Cardiff University
A.A. Omont
Institut d 'Astrophysique de Paris
I. Perez-Fournon
Instituto de Astrofísica de Canarias
University of La Laguna
D. A. Riechers
University of Cologne
D. Scott
University of British Columbia (UBC)
M. W.L. Smith
Cardiff University
F. Stanley
Institut de Radioastronomie Millimétrique (IRAM)
Y. Tamura
Nagoya University
P. Temi
NASA Ames Research Center
P. van der Werf
Leiden University
A. Verma
University of Oxford
C. Vlahakis
National Radio Astronomy Observatory
A. Weiss
Max Planck Society
Chentao Yang
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
A. J. Young
Rutgers University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 522 2 2995-3017Subject Categories
Astronomy, Astrophysics and Cosmology
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1093/mnras/stac3771