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.
galaxies: evolution
submillimetre: galaxies
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
Centre national de la recherche scientifique (CNRS)
Pierre and Marie Curie University (UPMC)
J. Gonzalez-Nuevo
Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)
University of Oviedo
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
Istituto nazionale di astrofisica (INAF)
University of Cape Town
D. A. Riechers
University of Cologne
T. Tsukui
Australian National University
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
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
Istituto nazionale di astrofisica (INAF)
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
The Graduate University for Advanced Studies (SOKENDAI)
University of Tokyo
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
Pierre and Marie Curie University (UPMC)
Centre national de la recherche scientifique (CNRS)
D. Scott
University of British Columbia (UBC)
Y. Tamura
National Astronomical Observatory of Japan
P. Temi
National Aeronautics and Space Administration (NASA)
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 2020.0081), 2021-07-01 -- 2026-06-30.
Knut and Alice Wallenberg Foundation (KAW 2019.0443), 2020-06-01 -- 2023-05-31.
Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
DOI
10.1093/mnras/stae2409