The Metallicity of Post-T Tauri Stars: A preliminary approach to the   understanding of the metal enrichment of stars harboring planets
  The metallicity of young low mass Post-T Tauri stars in coeval associations is practically unknown. This work is the beginning of a systematic measurement of these metallicities based on high resolution spectra of low rotating members of these associations. Here, we present an application by examining the behavior of the Iron abundance with stellar mass and temperature of some members of an association 30 Myr old. This will test the possibility of explaining the high metallic content of stars with planets by means of injection of planetesimals during this early stage of evolution. 
Ramiro de la Reza, Licio da Silva, Roberta Almeida, Isa Oliveira,   Carlos Alberto O. Torres, Germano R. Quast