A novel high-z submm galaxy efficient line survey in ALMA Bands 3 through 8-an ANGELS pilot
Journal article, 2024
We use the Atacama Large sub/Millimetre Array (ALMA) to efficiently observe spectral lines across Bands 3, 4, 5, 6, 7, and 8 at high-resolution (0.5-0.1 arcsec) for 16 bright southern Herschel sources at 1.5<z<4.2. With only six and a half hours of observations, we reveal 66 spectral lines in 17 galaxies. These observations detect emission from CO (3-2) to CO(18-17), as well as atomic ([CI](1-0), (2-1), [O I] 145 mu m and [N II] 205 mu m) lines. Additional molecular lines are seen in emission (H2O and H2O+) and absorption (OH+ and CH+). The morphologies based on dust continuum ranges from extended sources to strong lensed galaxies with magnifications between 2 and 30. CO line transitions indicate a diverse set of excitation conditions with a fraction of the sources (similar to 35 per cent) showcasing dense, warm gas. The resolved gas to star formation surface densities vary strongly per source, and suggest that the observed diversity of dusty star-forming galaxies could be a combination of lensed, compact dusty starbursts and extended, potentially merging galaxies. The predicted gas depletion time-scales are consistent with 100 Myr to 1 Gyr, but require efficient fuelling from the extended gas reservoirs onto the more central starbursts, in line with the Doppler-shifted absorption lines that indicate inflowing gas for two out of six sources. This pilot paper explores a successful new method of observing spectral lines in large samples of galaxies, supports future studies of larger samples, and finds that the efficiency of this new observational method will be further improved with the planned ALMA Wideband Sensitivity Upgrade.
submillimetre: galaxies
galaxies: evolution
galaxies: high-redshift
Author
Tom Bakx
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
A. Amvrosiadis
Durham University
G. J. Bendo
University of Manchester
H. S. B. Algera
National Astronomical Observatory of Japan
Hiroshima University
S. Serjeant
Open University
L. Bonavera
University of Oviedo
Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)
E. Borsato
Istituto nazionale di astrofisica (INAF)
X. Chen
National Astronomical Observatory of Japan
P. Cox
UPMC Univ Paris 6
Centre national de la recherche scientifique (CNRS)
J. Gonzalez-Nuevo
University of Oviedo
Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)
M. Hagimoto
National Astronomical Observatory of Japan
K. C. Harrington
European So Observ
R. J. Ivison
University of Edinburgh
European Southern Observatory (ESO)
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
Dublin Institute for Advanced Studies
P. Kamieneski
Arizona State University
L. Marchetti
University of Cape Town
INAF Ist Radioastron Italian ARC
D. A. Riechers
University of Cologne
T. Tsukui
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
Australian National University
P. P. van der Werf
Leiden University
Chentao Yang
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
J. A. Zavala
National Astronomical Observatory of Japan
P. Andreani
INAF Osservatorio Astron Roma
S. Berta
Institut de Radioastronomie Millimétrique (IRAM)
A. R. Cooray
University of California at Irvine (UCI)
G. De Zotti
Istituto nazionale di astrofisica (INAF)
S. Eales
Cardiff University
R. Ikeda
University of Tokyo
The Graduate University for Advanced Studies (SOKENDAI)
Kirsten Knudsen
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
I Mitsuhashi
National Astronomical Observatory of Japan
M. Negrello
Cardiff University
R. Neri
Institut de Radioastronomie Millimétrique (IRAM)
A. Omont
UPMC Univ Paris 6
Centre national de la recherche scientifique (CNRS)
D. Scott
University of British Columbia (UBC)
Y. Tamura
National Astronomical Observatory of Japan
P. Temi
NASA Ames Research Center
S. A. Urquhart
Open University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 535 2 1533-1574The Origin and Fate of Dust in Our Universe
Knut and Alice Wallenberg Foundation (KAW 2019.0443), 2020-06-01 -- 2023-05-31.
Knut and Alice Wallenberg Foundation (KAW 2020.0081), 2021-07-01 -- 2026-06-30.
Subject Categories
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
DOI
10.1093/mnras/stae2409