Speaker
Description
From observations of molecular gas emission and absorption in the cores of clusters and groups of galaxies it is possible to constrain the nature of individual molecular clouds and their distribution from parsec to kiloparsec scales. We will present the analysis of ALMA data for over 20 brightest cluster/group galaxies with strong central continuum sources where absorption from molecules of CO, CN, CS, HCN and HCO+ has been found. This analysis suggests that there are two distinct populations of clouds, one on kpc scales that have narrow line widths close to the systemic redshift of the system and another that is within 100pc that are broader and exclusively redshifted with respect to the host galaxy. We will review the potential of future observations with ALMA and complementary HI observations with Meerkat and SKA.
