Talk

Lithium and beryllium in solar twins

Jorge Melendez, Universidade de Sao Paulo

Solar twins are stars with mass and chemical composition similar to the Sun, therefore they follow about the same evolution and can be used to study the past and future of the Sun. I review our recent works on the evolution of lithium and beryllium, using a differential spectroscopic analysis of solar twins relative to the Sun. There is a clear trend of lithium depletion with increasing ages, while beryllium is only slightly depleted, suggesting a relatively shallow extra-mixing in Sun-like stars. I also discuss the possible connection between lithium and planets.