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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2017

The most distant, luminous, dusty star-forming galaxies: redshifts from NOEMA and ALMA spectral scans

Y. Fudamoto
  • Function : Author
R. J. Ivison
  • Function : Author
I. Oteo
  • Function : Author
M. Krips
  • Function : Author
Z. -Y. Zhang
  • Function : Author
A. Weiss
  • Function : Author
H. Dannerbauer
  • Function : Author
S. C. Chapman
  • Function : Author
L. Christensen
  • Function : Author
V. Arumugam
  • Function : Author
F. Bertoldi
  • Function : Author
M. Bremer
  • Function : Author
D. L. Clements
  • Function : Author
L. Dunne
  • Function : Author
S. A. Eales
  • Function : Author
J. Greenslade
  • Function : Author
S. Maddox
  • Function : Author
P. Martinez-Navajas
  • Function : Author
M. Michalowski
  • Function : Author
I. Pérez-Fournon
  • Function : Author
D. Riechers
  • Function : Author
J. M. Simpson
  • Function : Author
B. Stalder
  • Function : Author
E. Valiante
  • Function : Author
P. van der Werf
  • Function : Author

Abstract

We present 1.3- and/or 3-mm continuum images and 3-mm spectral scans, obtained using Northern Extended Millimeter Array (NOEMA) and Atacama Large Millimeter Array (ALMA), of 21 distant, dusty, star-forming galaxies. Our sample is a subset of the galaxies selected by Ivison et al. on the basis of their extremely red far-infrared (far-IR) colours and low Herschel flux densities; most are thus expected to be unlensed, extraordinarily luminous starbursts at z ≳ 4, modulo the considerable cross-section to gravitational lensing implied by their redshift. We observed 17 of these galaxies with NOEMA and four with ALMA, scanning through the 3-mm atmospheric window. We have obtained secure redshifts for seven galaxies via detection of multiple CO lines, one of them a lensed system at z = 6.027 (two others are also found to be lensed); a single emission line was detected in another four galaxies, one of which has been shown elsewhere to lie at z = 4.002. Where we find no spectroscopic redshifts, the galaxies are generally less luminous by 0.3-0.4 dex, which goes some way to explaining our failure to detect line emission. We show that this sample contains the most luminous known star-forming galaxies. Due to their extreme star-formation activity, these galaxies will consume their molecular gas in ≲ 100 Myr, despite their high molecular gas masses, and are therefore plausible progenitors of the massive, 'red-and-dead' elliptical galaxies at z ≈ 3.
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Dates and versions

insu-03747421 , version 1 (08-08-2022)

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Y. Fudamoto, R. J. Ivison, I. Oteo, M. Krips, Z. -Y. Zhang, et al.. The most distant, luminous, dusty star-forming galaxies: redshifts from NOEMA and ALMA spectral scans. Monthly Notices of the Royal Astronomical Society, 2017, 472, pp.2028-2041. ⟨10.1093/mnras/stx1956⟩. ⟨insu-03747421⟩
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