학술논문
VERTICO IV: Environmental Effects on the Gas Distribution and Star Formation Efficiency of Virgo Cluster Spirals
Document Type
Working Paper
Author
Villanueva, Vicente; Bolatto, Alberto D.; Vogel, Stuart; Brown, Tobias; Wilson, Christine D.; Zabel, Nikki; Ellison, Sara; Stevens, Adam R. H.; Donaire, Maria Jesus Jimenez; Spekkens, Kristine; Thorp, Mallory; Davis, Timothy A.; Parker, Laura C.; Roberts, Ian D.; Bisaria, Dhruv; Boselli, Alessandro; Catinella, Barbara; Chung, Aeree; Cortese, Luca; Lee, Bumhyun; Watts, Adam
Source
Subject
Language
Abstract
We measure the molecular-to-atomic gas ratio, $R_{\rm mol}$, and the star formation rate (SFR) per unit molecular gas mass, SFE$_{\rm mol}$, in 38 nearby galaxies selected from the Virgo Environment Traced in CO (VERTICO) survey. We determine their scale-lengths for the molecular and stellar components and find a roughly 3:5 ratio between them compared to $\sim$1:1 in field galaxies, indicating that the CO emission is more centrally concentrated than the stars. We compute $R_{\rm mol}$ as a function of different physical quantities. While the spatially-resolved $R_{\rm mol}$ on average decreases with increasing radius, we find that the mean molecular-to-atomic gas ratio within the stellar effective radius $R_{\rm e}$, $R_{\rm mol}(r