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Cloud-scale Molecular Gas Properties in 15 Nearby Galaxies

Sun, Jiayi; Leroy, Adam K.; Schruba, Andreas; Rosolowsky, Erik W.; Hughes, Annie; Kruijssen, J. M. Diederik; Meidt, Sharon E.; Schinnerer, Eva; Blanc, Guillermo A.; Bigiel, Frank; Bolatto, Alberto; Groves, Brent Allan


We measure the velocity dispersion, σ, and surface density, Σ, of the molecular gas in nearby galaxies from CO spectral line cubes with spatial resolution 45–120 pc, matched to the size of individual giant molecular clouds. Combining 11 galaxies from the PHANGS-ALMA survey with four targets from the literature, we characterize ~30,000 independent sightlines where CO is detected at good significance. Σ and σ show a strong positive correlation, with the best-fit power-law slope close to the...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aac326
Access Rights: Open Access


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