Differential abundances of a planet-hosting star and its wide binary companion to explore planet formation

JOFRE E.; PETRUCCI, R; YILEN GÓMEZ MAQUEO CHEW

Pasadena

Workshop; Exoplanet demographics; 2020

CALTECH

We present a high-precision elemental abundance study of a recently discovered planet-hosting binary system based on high-quality spectra. From our strictly differential abundance analysis, we have detected significant differences in the chemical composition of their photospheres that correlate with the elements? dust condensation temperature. We found that the secondary component, which hosts a transiting gas-giant planet, is depleted in volatiles and enhanced in refractories relative to the primary stellar companion, in which no planets have been detected (Jofré et al. in prep).