Wednesday

At 0.2 z 1.0 around 30% of galaxy clusters are in a disturbed state. Recent studies have shown that interactions between gas-rich cluster members and merger-induced shocks can enhance star formation activity in disturbed clusters, resulting in a reversal of the environmental trends typical of relaxed clusters. In order to understand how the enhanced star formation rates in these disturbed clusters are fuelled, it is vital to link observations tracing recent star formation to the reservoirs of cold, molecular gas. In this talk, I will present observations of the CO J=2-1 rotational transition for 92 galaxies in the nearby Antlia cluster from the Atacama Pathfinder Experiment (APEX). These measurements are used to trace the molecular gas content of our sample, which is then correlated with the galaxy properties, including stellar mass, star formation rate and HI mass. We also look for evidence of outflows or ram pressure stripping revealed either by velocity offsets between the optical position of the galaxy and the molecular gas, or by asymmetries in the CO line profile.