Lithium abundance of metal-poor stars

High-resolution, high signal-to-noise ratio spectra have been obtained for 32 metal-poor stars. The equivalent widths of Li lambda6708 Angstrom were measured and the lithium abundances were derived. The average lithium abundance of 21 stars on the lithium plateau is 2.33+/-0.02 dex. The Lithium plateau exhibits a marginal trend along metallicity, dA(Li)/d[Fe/H] = 0.12+/-0.06, and no clear trend with the effective temperature. The trend indicates that the abundance of lithium plateau may not be primordial and that a part of the lithium was produced in Galactic Chemical Evolution (GCE).Astronomy & AstrophysicsSCI(E)7ARTICLE5453-457