Per Bjerkeli, forskare vid avdelningen för Astronomi och Plasmafysik, institutionen för rymd-, geo- och miljövetenskap håller sin föreläsning för befordran till (oavlönad) docent.
The effects of winds on disk and planet formation?
How did the Sun, the Earth, and the other planets form? This fundamental question facing modern astronomy can only be fully explored when the formation and the earliest evolution of Solar-like stars is understood. While the process of star formation includes several distinct physical components, arguably the most prominent manifestation are so-called protostellar outflows, where the combination of gravity, rotation, and magnetic fields conspire to eject material from the surface of a protoplanetary accretion disk into the surrounding envelope. Outflows redistribute significant amounts of material and affect the structure of accretion disks and therefore the regions where planets form.
If we want to understand how stars and planets are formed, then we need to understand the detailed structure and kinematics of outflows and disks simultaneously. In this docent lecture, I will describe how we – through ALMA observations – have made progress in understanding early disk evolution and outflow launching. Furthermore, I will give a glimpse of the near-future and discuss what observations with the James Webb Space Telescope and sophisticated machine learning techniques can tell us about star- and planet formation.