Abstract:
We discuss the evolution of Li in the Galaxy based on a large sample of dwarfs
and giants collected from the cross-match of the Gaia and GALAH surveys. Data spans a wide
range in metallicity and cover various Galactic evolutionary phases. Metal-poor dwarfs with
[Fe/H] < -0.8 dex are found to have constant mean A(Li) = 2.2 dex with standard deviation
of 0.14 dex but with a very slightly increasing trend with increase in metallicity. However, in
the sub-solar metallicity range (-0.8 < [Fe/H] < 0 dex), Li has increased significantly from
the initial value of about 2.2 dex to the present value of about 3.3 dex. However, in supersolar metallicity stars, Li is found to be decreasing with increasing metallicity. We also discuss
briefly about a rare class of so called Li-rich low-mass giants as one of the promising candidate
for Li enrichment in the Galaxy
