The rotation periods of cool stars: Measurements, uses, connections and prospects
23rd - 26th September 2019
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.