Caracterización detallada de sistemas multi-planetarios Kepler en estrellas evolucionadas

JOFRE E.

Ciudad de México

Jornada; Astro-JAMBOREE; 2019

Instituto de Astronomía - UNAM

Our understanding of exoplanets structure, composition, formation, and evolution is strongly linked to our knowledge of a series of fundamental parameters of their host stars. On the one hand, stellar composition and mass have a major influence on the formation and evolution of planetary systems. On the other hand, models of planetary structure and composition rely on accurate estimations of their masses and radii, which for transiting planets, depend critically on the mass and radius of the parent star. These stellar properties, in turn, depend on the atmospheric parameters of the star, which can be derived from high-quality spectra. However, this kind of spectra is not commonly available for faint planet host stars such as those in the Kepler field. In this talk, we present a detailed stellar and planetary characterization of two Kepler multi-planet systems based on GEMINI-GRACES high-quality spectra.