Presentation #207.08 in the session Planetary Origins Dynamics Posters.
Different planet formation scenarios predict varying levels of impact violence during the growth of the terrestrial planets. Some scenarios, like the Grand Tack, hypothesize that the giant planets directly shape the inner disk and excite the orbits of protoplanets so that collisions are at high speeds. Other scenarios suggest a much more mild growth process dominated by pebble accretion. All of these scenarios can reproduce astrophysical observations of the solar system such as the orbits and masses of the planets and small body populations.
Impacts shape the growth of atmospheres since they are a primary loss process. We expect that since different planet formation scenarios create different projectile environments for the growing terrestrial planets, the atmospheres of these planets will reflect those differences. Here, we analyze the evolution of the major atmospheric gases such as nitrogen, water vapor, and carbon dioxide as planets grow in different terrestrial planet formation scenarios. The findings of this research contribute to the current efforts to improve our understanding of how Earth-like planets evolve, what their initial conditions looked like, and how the terrestrial planets of our Solar System may have formed.