What are we feeding baby planets? The chemical inventory of protoplanetary disks as traced by ALMA

Planet formation occurs on megayear timescales in the disks of gas, dust and ice around young stars. The composition of these forming planets, moons, and comets depends intricately on the chemical properties of the parent protoplanetary disk, and therefore, we can only unravel exoplanet composition demographics through our knowledge of disk chemistry. With the Atacama Large Millimeter/submillimeter Array (ALMA), we can obtain a molecular inventory of these disks and spatially resolve the gas emission on 10’s of au scales. In this talk, I will give an overview of the state of the field and show how a range of simple and complex molecules can be used to learn about the physics and chemistry operating in these disks, and what we can infer in terms of planet composition. In particular, I will highlight the recent detections of complex organic molecules, which may set the stage for rich prebiotic chemistry to occur during the planet formation timescale.