Astronomy and Astrophysics Seminars

Excess Lithium in Red Giant Branch Stars: An observational perspective to Li enrichment in the Galaxy.

by Prof. Bacham Eswar Reddy (IIA, Bengaluru)

Monday, January 14, 2019 from to (Asia/Kolkata)
at Lecture Theatre ( AG66 )
Lithium is one of the primordial elements produced during the big bang nucleosynthesis (BBN) and the predicted value is A(Li) = 2. 72 dex based on WMAP results. This is about a factor of 20 less than the present value of A(Li) = 3.2  dex observed in ISM and young stellar objects. One of the suggestions for Li sources is evolved stars, though stars are generally considered as Li sinks. In this talk I will concentrate on anomalously high  Li in red giant branch stars and its origin.