Galaxies at high-redshift: Insights from molecular line emission

Abstract:
Molecular gas, as the fuel for star formation, is intimately linked to the formation and evolution of 
galaxies and a key observable in studies of high-redshift star formation. It has now been 
detected in several hundred high-redshift galaxies, from FIR-luminous quasars and submillimeter 
galaxies to more 'normal' star forming galaxies on the main sequence. Beyond simple 
detections, we are now moving into the era of more complex observations, including resolved 
imaging and galaxy dynamics, spectral line scans, and molecular deep fields. I will discuss 
recent progress in this area, highlighting recent results from current centimeter/(sub-)millimeter 
interferometers and touching on future prospects with the full ALMA.