SEEDisCS

We investigate how the galaxy reservoirs of molecular gas fuelling star formation are transformed while host galaxies infall onto cluster cores. As part Spatially Extended ESO Distant Cluster Survey (SEEDisCS), we present CO(3-2) observations 27 star-forming obtained with Atacama Large Millimeter Array (ALMA). These sources located inside and around CL1411.1$-$1148 at $z=0.5195$, within five times virial radius. targets were selected to have stellar masses M$_{\rm star}$), colours, magnitudes similar those a field comparison sample redshift drawn from Plateau de Bure high-$z$ Blue Sequence (PHIBSS2). compare cold fraction ($\mu_{\rm H_2}=$ H_2}$/M$_{\rm specific rates (SFR/M$_{\rm star}$) depletion timescales ($t_{\rm depl}=$ H_2}$/SFR) our main-sequence PHIBSS2 subsample. While most (63\%) consistent PHIBSS2, remainder fall below relation between $\mu_\mathrm{H_2}$ star}$ $z\sim0.5$. low-$\mu_\mathrm{H_2}$ not compatible tail Gaussian distribution, hence they correspond new population normal SFRs but low content ($\lesssim 1$ Gyr), absent previous surveys. suggest that activity these has yet been diminished by their gas.