Abstract:
We discuss problems of planetesimal migration in the emerging Solar System and exoplanetary systems. Protoplanetary disk evolution models and the formation of planets are considered. The formation of the Moon and of the asteroid and trans-Neptunian belts is studied. We show that Earth and Venus could acquire more than half of their mass in 5 million years, and their outer layers could accumulate the same material from different parts of the feeding zone of these planets. The migration of small bodies toward the terrestrial planets from various regions of the Solar System is simulated numerically. Based on these computations, we conclude that the mass of water delivered to the Earth by planetesimals, comets, and carbonaceous chondrite asteroids from beyond the ice line could be comparable to the mass of Earth's oceans. The processes of dust migration in the Solar System and sources of the zodiacal cloud are considered.
Keywords:Solar System, migration, planetesimals, terrestrial planets, giant planets, growth of planetary embryos, formation of the Moon, collision probability, rarefied clumps, exoplanetary systems.
PACS:96.10.+i, 96.20.Br, 96.30.-t, 97.83.-j
Received:July 11, 2021 Revised:August 9, 2021 Accepted: August 21, 2021
Fulltext:
PDF file (1093 kB)
