Lunch talk on Dec. 11, 2023

Co-evolution of (Proto) Planets and Substructures in Disks

Speaker: Haochang Jiang (Tsinghua University & ESO)

Venue: SWIFAR Building 2111

Time: 12:30 PM, Monday, Dec. 11, 2023

Abstract: 

Protoplanetary disks, the birthplace of planets, exhibit prominent features such as bright rings and dark gaps in both continuum and line-emission maps. In my presentation, I will introduce two perspectives that establish connections between protoplanets, disk substructures, and astrochemistry. In the context of continuum emission, the accumulation of pebbles within these rings plays a crucial role in facilitating planetesimal formation and subsequent planet assembly. Using N-body simulations, we investigate the feasibility of planet formation within pebble rings and explore how this mechanism can explain the presence of mature planetary systems observed within debris disks, like the ones in HR 8799. Furthermore, the presence of rings in molecular emissions also offers insights into the potential circumstance of planet formation. By employing multi-fluid hydrodynamical simulations that consider evaporation fronts, we simulate the process of an accreting planet locally heating its surroundings, creating a gap in the disk, and initiating Carbon photochemistry. The simulation output provides a plausible explanation for certain molecular line distributions observed by ALMA.

Report PPT:  SWIFAR_Haocheng Jiang.pdf