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Lookup NU author(s): Dr Chris HarrisonORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2023 The Author(s). We present Atacama Large Millimeter/sub-millimeter Array neutral carbon, [](1-0), line observations that probe molecular hydrogen gas (H2) within seven radio galaxies at z = 2.9-4.5 surrounded by extended (â 100 kpc) Ly α nebulae. We extract [](1-0) emission from the radio-active galactic nuclei (AGNs) host galaxies whose positions are set by near-infrared detections and radio detections of the cores. Additionally, we place constraints on the galaxies' systemic redshifts via λ1640 lines seen with the Multi-Unit Spectroscopic Explorer. We detect faint [] emission in four out of seven sources. In two of these galaxies, we discover narrow-line emission of full width at half-maximum â 100 km s-1 that may trace emission from bright kpc-scale gas clouds within the interstellar medium (ISM). In the other two []-detected galaxies, line dispersions range from ∼100-600 km s-1 and may be tracing the rotational component of the cold gas. Overall, the [] line luminosities correspond to H2 masses of M⊙ for the detections and M⊙ for the [] non-detections in three out of seven galaxies within the sample. The molecular gas masses in our sample are relatively low in comparison to previously reported measures for similar galaxies that are M⊙. Our results imply that the observed faintness in carbon emission is representative of a decline in molecular gas supply from previous star formation epochs and/or a displacement of molecular gas from the ISM due to jet-powered outflows.
Author(s): Kolwa S, De Breuck C, Vernet J, Wylezalek D, Wang W, Popping G, Man AWS, Harrison CM, Andreani P
Publication type: Article
Publication status: Published
Journal: Monthly Notices of the Royal Astronomical Society
Year: 2023
Volume: 525
Issue: 4
Pages: 5831-5845
Print publication date: 01/11/2023
Online publication date: 02/09/2023
Acceptance date: 28/08/2023
Date deposited: 15/08/2024
ISSN (print): 0035-8711
ISSN (electronic): 1365-2966
Publisher: Oxford University Press
URL: https://doi.org/10.1093/mnras/stad2647
DOI: 10.1093/mnras/stad2647
Data Access Statement: The raw ALMA data underlying this article are available in the ALMA Science Portal at https://almascience.eso.org/, and can be accessed with the project ID: 2015.1.00530.S. The MUSE data are available in the ESO Science Archive Facility at http://archive.eso.org/cms.html. The processed MUSE data will be shared on reasonable request to the corresponding author. The Hubble Space Telescope (HST) data are available in the Hubble Legacy Archive at https://hla.stsci.edu/. The Spitzer Space Telescope data are available on the SHzRGs Archive at http://www.eso.org/~cdebreuc/shzrg/. The Karl G. Jansky Very Large Array (VLA) data are available from the VLA Legacy Data Archive at https://data.nrao.edu/portal/.
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