University of Sussex
Browse
1807.04697.pdf (30.97 MB)

"Super-deblended" dust emission in galaxies: II. Far-IR to (sub)millimeter photometry and high redshift galaxy candidates in the full COSMOS field

Download (30.97 MB)
journal contribution
posted on 2023-06-09, 14:42 authored by Shuowen Jin, Emanuele Daddi, Daizhong Liu, Vernesa Smolcic, Eva Schinnerer, Antonello Calabró, Qiusheng Gu, Jacinta Delhaize, Ivan Delvecchio, Yu Gao, Mara Salvato, Annagrazia Puglisi, Mark Dickinson, Frank Bertoldi, Mark Sargent, Mladen Novak, Georgios Magdis, Itziar Aretxaga, Grant W Wilson, Peter Capak
We present a "super-deblended" far-infrared to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with the method recently developed by Liu et al. 2018, with key adaptations. We obtain point spread function (PSF) fitting photometry at fixed prior positions including 88,008 galaxies detected in either VLA 1.4~GHz, 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 non relevant priors at FIR/(sub)mm bands using spectral energy distribution (SED) fitting and redshift information. In order to cope with the shallower COSMOS data we subtract from the maps the flux of faint non-fitted 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~GHz 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 provide a remarkable validation of the technique. We detect 11,220 galaxies over the 100--1200~µm range, extending to zphot~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~1000M?~yr-1). The photometric and value added catalogs are publicly released.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

The Astrophysical Journal

ISSN

0004-637X

Publisher

American Astronomical Society

Issue

56

Volume

864

Page range

1-32

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Astronomy Centre Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-08-23

First Open Access (FOA) Date

2018-08-23

First Compliant Deposit (FCD) Date

2018-08-21

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC