Metalicidad estelar, discos protoplanetarios y planetas

GARCÍA, L.; JOFRE E.; PETRUCCI, R.; GOMEZ M.

Malargue

Congreso; Reunión de la Asociación Argentina de Astronomía 2017; 2017

In this contribution we study the metallicities of young T Tauri type stars and compare them with the metallicities of main-sequence stars with and without debris disks and with detected planets. For this purpose, we selected young stars in nearby star formation regions and main-sequence stars with metallicities available in the literature. In addition, we search for correlations between metallicities and the existence of circumstellar disks. The comparison of both metallicities distributions shows that the median values are comparable for young and main-sequence stars, regardless of whether the latter have evidence of disk or not. However, the metallicities distributions would be different (): within the main-sequence stars there is a set of low metallicity objects not present in the group of young stars. On the other hand, the sample of main-sequence stars with detected planets has a higher median metallicity than the sample of young stars (0.08 vs. 0.07). This is an interesting result since the young stars analyzed in this work would be the progenitors of the stars with planets.