Vertico. IV. Environmental effects on the gas distribution and star formation efficiency of virgo cluster spirals

Villanueva, Vicente, Bolatto, Alberto D., Vogel, Stuart, Brown, Tobias, Wilson, Christine D., Zabel, Nikki, Ellison, Sara, Stevens, Adam R. H., Jiménez Donaire, María Jesús, Spekkens, Kristine, Tharp, Mallory, Davis, Timothy A. ORCID: https://orcid.org/0000-0003-4932-9379, Parker, Laura C., Roberts, Ian D., Basra, Dhruv, Boselli, Alessandro, Catinella, Barbara, Chung, Aeree, Cortese, Luca ORCID: https://orcid.org/0000-0002-7422-9823, Lee, Bumhyun and Watts, Adam 2022. Vertico. IV. Environmental effects on the gas distribution and star formation efficiency of virgo cluster spirals. Astrophysical Journal 940 (2) , 176. 10.3847/1538-4357/ac9d3c

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Abstract

We measure the molecular-to-atomic gas ratio, R mol, and the star formation rate (SFR) per unit molecular gas mass, SFEmol, in 38 nearby galaxies selected from the Virgo Environment Traced in CO (VERTICO) survey. We stack ALMA 12CO (J = 2−1) spectra coherently using H i velocities from the VIVA survey to detect faint CO emission out to galactocentric radii r gal ∼ 1.2 r 25. We determine the scale lengths for the molecular and stellar components, finding a ∼3:5 relation compared to ∼1:1 in field galaxies, indicating that the CO emission is more centrally concentrated than the stars. We compute R mol as a function of different physical quantities. While the spatially resolved R mol on average decreases with increasing radius, we find that the mean molecular-to-atomic gas ratio within the stellar effective radius R e , R mol(r < R e ), shows a systematic increase with the level of H i, truncation and/or asymmetry (HI perturbation). Analysis of the molecular- and the atomic-to-stellar mass ratios within R e , R⋆mol(r

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Type: cc-by
Publisher:	American Astronomical Society
ISSN:	0004-637X
Date of First Compliant Deposit:	5 December 2022
Date of Acceptance:	9 October 2022
Last Modified:	05 May 2023 21:01
URI:	https://orca.cardiff.ac.uk/id/eprint/154654

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