EAI Seminars: Genetic links between stars, their circumstellar disks and their planets скачать в хорошем качестве

EAI Seminars: Genetic links between stars, their circumstellar disks and their planets

Diego Turrini, INAF , Turin Astrophysical Observatory, Italy Tuesday 10 June 2025, 16:00 CEST The formation histories of planets are shaped by the physical characteristics of their native disk environments, which in turn are connected to those of the host stars. Both the mass and accretion rate of protoplanetary disks are known to be proportional to the stellar mass. The stellar metallicity determines the maximum dust-to-gas ratio of disks. The balance between the disk accretional heating and the stellar luminosity sets the disk thermal structure and, together with the stellar composition and refractory-to-volatile ratio, controls the local abundance of planet-building materials, including ices and organics. The growth rate of planets is limited by the local availability of dust and gas, which is governed by the disk mass transport processes and by planetary migration, in turn set by the disk mass. Planets formed around different stars will therefore be born in different disk environments and, due to these star-disk connections, can be the product of diverging growth and migration histories even when they share the same final physical properties. In this seminar I will present recent advances in our growing understanding of this multifaceted problem.