Special Seminar | Alexandros Ziampras (LMU Munich)

Speaker: Alexandros Ziampras (LMU Munich)
Title: Dusty substructures in protoplanetary disks

Abstract: CONTEXT: Protoplanetary disks exhibit a rich variety of substructure. In mm continuum emission, this is often attributed to unseen, gap-opening planets that can trap dust particles at pressure bumps. In scattered light images, several observed sources instead exhibit shadows that could be caused by misaligned inner disks.
METHODS: We present high-resolution radiation hydrodynamics simulations thermally and dynamically coupled to a two-population dust model.
RESULTS: We find that dust dynamics can significantly affect the resulting substructure driven by the planet. Shadows cast by a misaligned inner disk onto the outer disk can launch spiral arms at the shadow edges that permeate the entire disk. This leads to formation of concentric gaps, trapping dust at their edges and forming bright rings in continuum emission. We then compute synthetic images at mm and scattered light wavelengths and draw parallels to observed systems.
CONCLUSION: Our results underscore the importance of an accurate treatment of radiative processes as well as dust-gas dynamics in interpreting the observed substructure in protoplanetary disks.

• Date:
  March 19, 2025, 1:30 p.m. – 2:30 p.m.
  
  
• Location:

  AIP; Leibnizhaus, Seminar room

  
  
• Contact:
  Oliver Gressel
  ogressel@aip.de