Exploring the effects of stellar multiplicity on planet formation

Séminaire IPAG de Nicolas Cuello (Université Catholique du Chili), jeudi 26 septembre 2019 à 11h00, IPAG seminar room

Three facts :

• stellar multiplicity is high during early stellar evolution,
• planet formation occurs early on, and
• planets are detected in multiple stellar systems.

Three consequences :

• planet formation does not occur in isolation,
• planet formation is resilient, and
• the environment of stellar formation affects the final planetary architecture.
  
  In this talk we explore circumbinary discs dynamics and also discs affected by stellar flybys, mainly through 3D SPH hydrodynamical simulations. The goal is to better understand the initial conditions for planet formation in multiple systems.
  
  Based on these findings, we build a catalogue of observational signatures of such discs using MCFOST.
  
  To conclude, we connect these synthetic observations to recent multi-wavelength observations of discs exhibiting mysterious asymmetries (e.g. AS 205, UX Tau, FU Ori).
  
  Our conclusion : stellar multiplicity deeply affects planet formation.