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New constraints on the (CO)-C-12(2-1)/(1-0) line ratio across nearby disc galaxies

den Brok, J S; Chatzigiannakis, D; Bigiel, Frank; Puschnig, J; Barnes, Ashley T; Leroy, Adam K; Jimenez-Donaire, M J; Usero, Antonio; Schinnerer, E; Rosolowsky, Erik; Grasha, Kathryn


Both the CO(2-1) and CO(1-0) lines are used to trace the mass of molecular gas in galaxies. Translating the molecular gas mass estimates between studies using different lines requires a good understanding of the behaviour of the CO(2-1)-to-CO(1-0) ratio, R-21. We compare new, high-quality CO(1-0) data from the IRAM 30-m EMIR MultiLine Probe of the ISM Regulating Galaxy Evolution survey to the latest available CO(2-1) maps from HERA CO-Line Extragalactic Survey, Physics at High Angular...[Show more]

CollectionsANU Research Publications
Date published: 2021
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stab859
Access Rights: Open Access


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