Oral comunication
V. Zh. Adibekyan
Abstract
Stellar atmospheres serve as a crucial gateway to understanding the primordial composiDon of
planetary systems. As planet-forming disks dissipate within a few million years, stellar observaDons
become the primary means to probe their remnants. While convenDonal models assume a direct
correspondence between the composiDons of rocky exoplanets and their host stars, recent work by
Adibekyan et al. (2021) challenges this assumpDon. They showed that while there is a relaDon between
the composiDon of rocky planets and their host stars, the relaDon is not one-to-one. However, their
study had limitaDons: neglecDng volaDle elements (e.g. water) in planetary interiors and relying on
present-day stellar abundances as proxies for primordial disk composiDons, overlooking stellar
evoluDon effects such as atomic diffusion. Over the past two years, the EXO-Terra project has
addressed these limitaDons and expanded the dataset by approximately 50%. Through comprehensive
analysis, we aimed to refine the understanding of the star-planet composiDonal link. I propose an oral
presentaDon to share the findings of the EXO-Terra project, which directly align with the scienDfic
objecDves of PLATO, encompassing both stellar and planetary science cases.
ESP2024: PLATO Planetary Systems - Formation to observed architectures
Catania, Italy
2024 May
