The JCMT SCUBA-2 Survey of the James Webb Space Telescope North Ecliptic Pole Time-Domain Field
Abstract
The James Webb Space Telescope Time-Domain Field (JWST-TDF) is an ~14' diameter field near the North Ecliptic Pole that will be targeted by one of the JWST Guaranteed Time Observations programs. Here, we describe our James Clerk Maxwell Telescope SCUBA-2 850 μm imaging of the JWST-TDF and present the submillimeter source catalog and properties. We also present a catalog of radio sources from Karl J. Jansky Very Large Array 3 GHz observations of the field. These observations were obtained to aid JWST's study of dust-obscured galaxies that contribute significantly to cosmic star formation at high redshifts. Our deep 850 μm map covers the JWST-TDF at a noise level of σ 850µm = 1.0 mJy beam-1, detecting 83/31 sources in the main/supplementary signal-to-noise ratio (S/N > 4 / S/N = 3.5-4) sample, respectively. The 3 GHz observations cover a 24' diameter field with a 1σ noise of 1 μJy beam-1 at a 0.″7 FWHM. We identified eighty-five 3 GHz counterparts to sixty-six 850 μm sources and then matched these with multiwavelength data from the optical to the mid-infrared wave bands. We performed spectral energy distribution fitting for 61 submillimeter galaxies (SMGs) matched with optical/near-infrared data, and found that SMGs at S/N > 4 have a median value of z phot = 2.22 ± 0.12, star formation rates of 300 ± 40 M ⊙ yr-1 (Chabrier initial mass function), and typical cold dust masses of 5.9 ± 0.7 × 108 M ⊙, in line with bright SMGs from other surveys. The large cold dust masses indicate correspondingly large cool gas masses, which we suggest are a key factor necessary to drive the high star formation rates seen in this population.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- January 2023
- DOI:
- 10.3847/1538-4365/ac9bf4
- arXiv:
- arXiv:2301.02786
- Bibcode:
- 2023ApJS..264...19H
- Keywords:
-
- Galaxy evolution;
- High-redshift galaxies;
- Galaxy formation;
- Submillimeter astronomy;
- Galaxy counts;
- Ultraluminous infrared galaxies;
- 594;
- 734;
- 595;
- 1647;
- 588;
- 1735;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 22 pages, 18 figures (1 extended figure and the full catalog are included), Published in ApJS