Oral comunication
B. Soares
Abstract
A protoplanetary disk surrounds newly formed stars. A fraction of this disk material condenses into
planet-forming blocks, and most of it eventually accretes onto the star within a few million years, up until
the dissipation of the disk. The specific composition of the accreted material may affect the final composition
of stars. Accretion of the metal-rich planetary material (i.e., the in-fall and consequent engulfment of planets)
may result in a modification of the stellar surface composition. Moreover, a chemical imprint due to planet
engulfment can depend on the disk lifetime and amount of planetary matter, but also on the stellar age, as
a large convective layer would prevent an observable change in the stellar composition. We have analysed
the recent data from the New Generation Planetary Population Synthesis (NGPPS) calculations by the
Generation III Bern model which simulates the formation and evolution of 1000 planetary systems across 10
Gyr. I propose an oral contribution to present our new findings on the timing, mechanisms, and occurrence
rate of planet engulfment around Sun-like stars, and the consequences of the results for stellar chemical
anomalies.
PLANETS Kick-off Meeting
Torun, Poland
2024 July
