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

Nikki Zabel, Toby Brown, Christine D. Wilson, Timothy A. Davis, Luca Cortese, Laura C. Parker, Alessandro Boselli, Barbara Catinella, Ryan Chown, Aeree Chung, Tirna Deb, Sara L. Ellison, María J. Jiménez-Donaire, Bumhyun Lee, Ian D. Roberts, Kristine Spekkens, Adam R.H. Stevens, Mallory Thorp, Stephanie Tonnesen, Vicente Villanueva

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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≤logM∗/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.

Original languageEnglish
Article number10
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 2022 Jul 1

Bibliographical note

Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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