Constraining Resolved Extragalactic R21 Variation with Well-calibrated ALMA Observations

Constraining Resolved Extragalactic R21 Variation with Well-calibrated ALMA Observations

CO(1–0) and CO(2–1) are commonly used as bulk molecular gas tracers. The CO line ratios (especially CO(2–1)/CO(1–0)– R _21 ) vary within and among galaxies, yet previous studies on R _21 and alike often rely on measurements constructed by combining data from facilities with substantial relative cali...

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Bibliographic Details
Main Authors: Jakob den Brok, Elias K. Oakes, Adam K. Leroy, Eric W. Koch, Antonio Usero, Erik W. Rosolowsky, Frank Bigiel, Jiayi Sun, Hao He, Ashley T. Barnes, Yixian Cao, Fu-Heng Liang, Hsi-An Pan, Toshiki Saito, Sumit K. Sarbadhicary, Thomas G. Williams
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal
Subjects:
Interstellar medium
Spiral galaxies
Molecular gas
Millimeter-wave spectroscopy
Radio interferometry
Online Access:https://doi.org/10.3847/1538-4357/addf4c
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