Exploring the interplay of dust and gas phases in DustPedia star-forming galaxies
Francesco Salvestrini, Simone Bianchi, Edvige Corbelli

TL;DR
This study investigates the relationships between molecular gas, atomic gas, dust, and galaxy properties in nearby star-forming galaxies, highlighting the importance of the stellar potential and proposing IR luminosities as proxies for molecular gas and dust.
Contribution
It introduces a comprehensive analysis of ISM phases in DustPedia galaxies, emphasizing the stellar potential's role and proposing IR luminosities as proxies for molecular gas and dust masses.
Findings
Total gas mass correlates tightly with dust mass.
Molecular gas shows a good correlation with dust.
Mid and far-IR luminosities can serve as proxies for molecular gas and dust.
Abstract
Molecular gas is the key ingredient of the star formation cycle, and tracing its dependencies on other galaxy properties is essential for understanding galaxy evolution. In this work, we explore the relation between the different phases of the interstellar medium (ISM), namely molecular gas, atomic gas, and dust, and galaxy properties using a sample of nearby late-type galaxies. To this goal, we collect CO maps for 121 galaxies from the DustPedia project, ensuring an accurate determination of , the global molecular gas mass. We investigate which scaling relations provide the best description of , based on the strength of the correlation and its intrinsic dispersion. Commonly used correlations between and star formation rate (SFR) and stellar mass () are affected by large scatter, which accounts for galaxies that are experiencing quenching of their…
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