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VERTICO II: How H i-identified Environmental Mechanisms Affect the Molecular Gas in Cluster GalaxiesZabel, Nikki; Brown, Toby; Wilson, Christine D.; Davis, Timothy A.; Cortese, Luca; Parker, Laura C.; Boselli, Alessandro; Catinella, Barbara; Chown, Ryan; Chung, Aeree; Deb, Tirna; Ellison, Sara L.; Jiménez-Donaire, María J.; Lee, Bumhyun; Roberts, Ian D.; Spekkens, Kristine; Stevens, Adam R. H.; Thorp, Mallory; Tonnesen, Stephanie; Villanueva, Vicente
Astrophysical journal/The Astrophysical journal, 07/2022, Volume: 933, Issue: 1Journal Article
Abstract In this VERTICO early science paper we explore in detail how environmental mechanisms, identified in H i , affect the resolved properties of molecular gas reservoirs in cluster galaxies. The molecular gas is probed using ALMA ACA (+TP) observations of 12 CO(2–1) in 51 spiral galaxies in the Virgo cluster (of which 49 are detected), all of which are included in the VIVA H i survey. The sample spans a stellar mass range of 9 ≤ log M ⋆ / M ⊙ ≤ 11 . We study molecular gas radial profiles, isodensity radii, and surface densities as a function of galaxy H i deficiency and morphology. There is a weak correlation between global H i and H 2 deficiencies, and resolved properties of molecular gas correlate with H i deficiency: galaxies that have large H i deficiencies have relatively steep and truncated molecular gas radial profiles, which is due to the removal of low-surface-density molecular gas on the outskirts. Therefore, while the environmental mechanisms observed in H i also affect molecular gas reservoirs, there is only a moderate reduction of the total amount of molecular gas.
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