Down but Not Out: Properties of the Molecular Gas in the Stripped Virgo Cluster Early-type Galaxy NGC 4526

We present ALMA data on the 3mm continuum emission, CO isotopologues (12CO, 13CO, C18O), and high-density molecular tracers (HCN, HCO+, HNC, HNCO, CS, CN, CH3OH) in NGC4526. These enable a detailed study of physical properties gas longtime resident Virgo Cluster; comparisons to more commonly-studied spiral galaxies offer intriguing hints into processing cluster environment. Many line ratios NGC4526, along with our inferred abundances CO/H2 conversion factors, are similar those found nearby spirals. One striking exception is very low observed 12CO/13CO(1-0) ratio, $3.4\pm0.3$, which unusually for spirals though not Cluster early-type galaxies. carry out radiative transfer modeling some archival (2-1) data, we use Bayesian analysis Markov chain Monte Carlo techniques infer CO-emitting gas. find surprisingly [12CO/13CO] abundance $7.8^{+2.7}_{-1.5}$ $6.5^{+3.0}_{-1.3}$ at radii 0.4 kpc 1 kpc. The emission from HCN, CS CN also relatively bright, optically thick inner parts features hint that environment may have removed much galaxy's diffuse, thinner its atomic Angular momentum surrounding intracluster medium caused contraction disk, magnifying radial gradients such as [13CO/C18O]. More chemical evolution would be interesting order explore whether unusual ratio entirely an environmental effect or it reflects old stellar population this galaxy.