Theoretical LTE & NLTE curves of growth for Li I lines in G-M dwarfs and subgiants

Abstract

Detailed simultaneous radiative transfer-statistical equilibrium calculations have been performed for lithium in atmospheres of solar metallicity G-M dwarfs and subgiants. Model atmospheres of stars with $3500 \le \Tf \le 6000$ K, $3.0 \le \lgg \le 4.5$ have been considered. The behaviour of level populations, source functions and curves of growth for the lithium doublet at $λ670.8$~nm and two subordinate lines of astrophysical interest ($λ610.3$~nm and $λ812.6$~nm) are discussed. For the coolest atmospheres of our grid we find that the dependence of non-LTE equivalent widths and profiles on gravity is very weak. The computed LTE and non-LTE curves of growth are given in tabular form.