LITHIUM IN DEBRIS DISK STARS

CHAVERO, C.;; DE LA REZA, R.; GHEZZI, L.; LLORENTE DE ANDRÉS, F.; PINZÓN, G.; PEREIRA, C. B.

Buzios

Congreso; XXXVIII Reunião Anual da SAB; 2014

Sociedade Astronômica Brasileria

Up to now there is a relatively large number of works devoted to studies of the lithium depletion in solar type stars, with and without planets. In spite of this, no consensus has been attained on the effect of planets. Here we show that disks, in which planets have been formed, are the best tool for these studies. In fact, disks are directly physically connected with the central stars. In this work, by means of observations of 86 solar type stars with and without debris disks, we validate a theoretical stellar internal model. This one shows that the lifetime of protoplanetary disks during the first 10 Myr of the PMS controls the destinies of stellar rotation and in consequence the Li depletion. In our work, debris disks and planets are considered as reminiscent of the existence of the important previous planetary disks.