Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles The Astrophysical Journal Year : 2022

Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies

Sinclaire M. Manning
  • Function : Author
Caitlin M. Casey
  • Function : Author
Jorge A. Zavala
  • Function : Author
Georgios E. Magdis
  • Function : Author
Patrick M. Drew
  • Function : Author
Jaclyn B. Champagne
  • Function : Author
Manuel Aravena
David L. Clements
  • Function : Author
Steven L. Finkelstein
  • Function : Author
Seiji Fujimoto
Christopher C. Hayward
  • Function : Author
Jacqueline A. Hodge
  • Function : Author
Jeyhan S. Kartaltepe
  • Function : Author
Kirsten K. Knudsen
  • Function : Author
Anton M. Koekemoer
  • Function : Author
Allison W. S. Man
  • Function : Author
David B. Sanders
  • Function : Author
Kartik Sheth
Justin S. Spilker
  • Function : Author
Johannes Staguhn
  • Function : Author
Margherita Talia
  • Function : Author
Ezequiel Treister
  • Function : Author
Min S. Yun
  • Function : Author

Abstract

The 2 mm Mapping Obscuration to Reionization with ALMA (MORA) Survey was designed to detect high-redshift (z ≳ 4), massive, dusty star-forming galaxies (DSFGs). Here we present two likely high-redshift sources, identified in the survey, whose physical characteristics are consistent with a class of optical/near-infrared (OIR)-invisible DSFGs found elsewhere in the literature. We first perform a rigorous analysis of all available photometric data to fit spectral energy distributions and estimate redshifts before deriving physical properties based on our findings. Our results suggest the two galaxies, called MORA-5 and MORA-9, represent two extremes of the "OIR-dark" class of DSFGs. MORA-5 ( ${z}_{\mathrm{phot}}={4.3}_{-1.3}^{+1.5}$ ) is a significantly more active starburst with a star formation rate (SFR) of ${830}_{-190}^{+340}$ M yr-1 compared to MORA-9 ( ${z}_{\mathrm{phot}}={4.3}_{-1.0}^{+1.3}$ ), whose SFR is a modest ${200}_{-60}^{+250}$ M yr-1. Based on the stellar masses (M ≍ 1010-11 M ), space density (n ~ (5 ± 2) × 10-6 Mpc-3, which incorporates two other spectroscopically confirmed OIR-dark DSFGs in the MORA sample at z = 4.6 and z = 5.9), and gas depletion timescales (<1 Gyr) of these sources, we find evidence supporting the theory that OIR-dark DSFGs are the progenitors of recently discovered 3 < z < 4 massive quiescent galaxies.
Fichier principal
Vignette du fichier
Manning_2022_ApJ_925_23.pdf (2.02 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03667484 , version 1 (13-05-2022)

Licence

Attribution

Identifiers

Cite

Sinclaire M. Manning, Caitlin M. Casey, Jorge A. Zavala, Georgios E. Magdis, Patrick M. Drew, et al.. Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies. The Astrophysical Journal, 2022, 925, ⟨10.3847/1538-4357/ac366a⟩. ⟨insu-03667484⟩
9 View
14 Download

Altmetric

Share

Gmail Facebook X LinkedIn More