Detailed characterization of the planet-hosting binary system HD 202772

JOFRÉ, EMILIANO; MAQUEO CHEW, YILEN GÓMEZ; PETRUCCI, ROMINA; SAFFE, CARLOS

Congreso; 65 Reunión de la Asociación Argentina de Astronomía; 2023

The components of binary systems form from the same gas cloud at the same time and, hence, they share the initial chemical composition. Thus, binary systems are ideal laboratories to test how planetary formation, and/or other astrophysical processes (e.g., atomic diffusion), might influence the stellar composition. Here, we present high-precision stellar parameters and detailed chemicalabundances of the HD 202772 planet-hosting wide binary system (Wang et al. 2019). Component Ahosts a transiting gas giant planet, while no planet has been reported yet around component B. In addition, we used our precise stellar parameters alongside TESS photometric observations and radial velocity (RV) measurements from the literature to refine planet properties (Jofré et al., in prep).