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Over abundances of Lithium in stars of red giant branch: Current Status

Eswar Reddy
Indian Institute of Astrophysics

October 8th, 2018


Abstract: A small group of giants on RGB show anomalously large amounts of Li in their
photospheres. In some cases, Li abundance exceeds stars' natal clouds (A(Li) = 3.2~dex)
suggesting  addition of fresh Li during stars' evolution on RGB. However, the mechanism
that is responsible for such large enhancement is not understood. In this talk, I will describe
observational results till date,  possible scenarios for its origin and implications to Galactic Li