In this VERTICO early science paper we explore in detail how environmental mechanisms, identified in HI, 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 HI survey. The sample spans a stellar mass range of 9 < log M*/Msol < 11. We study molecular gas radial profiles, isodensity radii, and surface densities as a function of galaxy HI deficiency and morphology. There is a weak correlation between global HI and H2 deficiencies, and resolved properties of molecular gas correlate with HI deficiency: galaxies that have large HI 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 HI also affect molecular gas reservoirs, there is only a moderate reduction of the total amount of molecular gas.
@article{arxiv.2205.05698,
title = {VERTICO II: effects of HI-identified environmental mechanisms on molecular gas},
author = {Nikki Zabel and Toby Brown and Christine D. Wilson and Timothy A. Davis and Luca Cortese and Laura C. Parker and Alessandro Boselli and Barbara Catinella and Ryan Chown and Aeree Chung and Tirna Deb and Sara L. Ellison and María J. Jiménez-Donaire and Bumhyun Lee and Ian D. Roberts and Kristine Spekkens and Adam R. H. Stevens and Mallory Thorp and Stephanie Tonnesen and Vicente Villanueva},
journal= {arXiv preprint arXiv:2205.05698},
year = {2023}
}
Comments
Published in ApJ. 22 pages, 6 figures, 1 table, 1 appendix. Erratum accepted for publication in ApJ