VERTICO II: How H i-identified Environmental Mechanisms Affect the Molecular Gas in Cluster Galaxies Journal Articles uri icon

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  • 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 12CO(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 H2 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.


  • Zabel, Nikki
  • Brown, Toby
  • Wilson, Christine D
  • Davis, Timothy A
  • Cortese, Luca
  • Parker, Laura
  • 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 RH
  • Thorp, Mallory
  • Tonnesen, Stephanie
  • Villanueva, Vicente

publication date

  • July 1, 2022