“Super-deblended” Dust Emission in Galaxies. II. Far-IR to (Sub)millimeter Photometry and High-redshift Galaxy Candidates in the Full COSMOS Field

Scientific paper - Original scientific paper

• Author: Jin Shuowen
• Author: Emanuele Daddi
• Author: Daizhong Liu
• Author: Vernesa Smolčić
• Author: Eva Schinnerer
• Author: Antonello Calabró
• Author: Qiusheng Gu
• Author: Jacinta Delhaize
• Author: Ivan Delvecchio
• Author: Yu Gao
• Author: Mara Salvato
• Author: Annagrazia Puglisi
• Author: Mark Dickinson
• Author: Frank Bertoldi
• Author: Mark Sargent
• Author: Mladen Novak; MBZ: 344074
• Author: Georgios Magdis
• Author: Itziar Aretxaga
• Author: Grant W. Wilson
• Author: Peter Capak
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics; Astronomy and Astrophysics

Abstract (english)

We present a “super-deblended” far-infrared (FIR) to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with the method recently developed by Liu et al., with key adaptations. We obtain point- spread function fitting photometry at fixed prior positions including 88, 008 galaxies detected in VLA 1.4, 3 GHz, and/or MIPS 24 μm images. By adding a specifically carved mass- selected sample (with an evolving stellar mass limit), a highly complete prior sample of 194, 428 galaxies is achieved for deblending FIR/(sub)mm images. We performed “active” removal of nonrelevant priors at FIR/(sub)mm bands using spectral energy distribution fitting and redshift information. In order to cope with the shallower COSMOS data, we subtract from the maps the flux of faint nonfitted priors and explicitly account for the uncertainty of this step. The resulting photometry (including data from Spitzer, Herschel, SCUBA2, AzTEC, MAMBO, and NSF’s Karl G. Jansky Very Large Array at 3 and 1.4 GHz) displays well-behaved quasi-Gaussian uncertainties calibrated from Monte Carlo simulations and tailored to observables (crowding, residual maps). Comparison to ALMA photometry for hundreds of sources provides a remarkable validation of the technique. We detect 11, 220 galaxies over the 100–1200 μm range extending to z_phot ∼ 7. We conservatively selected a sample of 85 z > 4 high-redshift candidates significantly detected in the FIR/(sub)mm, often with secure radio and/or Spitzer/IRAC counterparts. This provides a chance to investigate the first generation of vigorous starburst galaxies (SFRs ∼ 1000 Me_⊙ yr^−1 ). The photometric and value-added catalogs are publicly released.

• Keywords (english): galaxies: ISM; galaxies: photometry; galaxies: star formation; infrared: galaxies; techniques: photometric
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Astrophysical Journal
• Numbering: vol. 864, 56
• p-ISSN: 0004-637X
• e-ISSN: 1538-4357
• DOI: https://doi.org/10.3847/1538-4357/aad4af
• URN:NBN: urn:nbn:hr:217:378172
• Publication: 2018
• Document URL: https://iopscience.iop.org/article/10.3847/1538-4357/aad4af
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2018. The American Astronomical Society. Received 2018 February 6; Revised 2018 July 3; Accepted 2018 July 9; Published 2018 August 30.
• Created on: 2020-03-01 16:42:05