Planet Formation: From Dust Coagulation to Final Orbit Assembly

01 - 26 June 2020 virtual and postponed to 07 June to 01 July 2022

Man Hoi Lee, Nader Haghighipour, Soko Matsumura, Hilke Schlichting

The collective properties of the currently known ~ 4000 extrasolar planets have left no doubt that planetary systems come in a variety of sizes and orbital configurations. These diverse characteristics of planetary systems, combined with new observational data of our solar system, have raised many questions on the processes involved in the formation of planetary bodies and their dynamical evolution. This programme will bring together experts with complementary expertise in observation, theory, solar system and extrasolar planets to assess the current status of planet formation models, highlight problems in each formation stage, and explore the possibility of developing comprehensive models that can be applied to different planetary systems.

The questions to be addressed will include:

  • How do dust aggregates grow to objects of mm to cm in size?
  • How do these cm-sized bodies grow to larger bodies, and what determines their chemical composition?
  • How do gas-giant planets form, and what determines their composition and internal structures?
  • How did Earth acquire its water and other volatiles and chemical elements?
  • How are chemical elements transferred during giant impacts in a planetary system?
  • What determines the final composition of the atmosphere of a planet?
  • How do super-Earth planets form?
  • How do planetary migration and dynamical instabilities affect the formation of planets and their orbital architectures?
  • How does planet formation proceed in and around a binary star system?
  • How do stellar and planetary tides affect orbital evolution of planetary systems?