Influence of departures from LTE on calcium,titanium, and iron abundance determinations in cool giants of different metallicities |
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Authors: | L I Mashonkina T N Sitnova Yu V Pakhomov |
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Institution: | 1.Institute of Astronomy,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | We have performed statistical equilibrium calculations for Ca I–Ca II, Ti I–Ti II, and Fe I–Fe II by taking into account the nonequilibrium line formation conditions (the non-LTE approach) in model atmospheres of giant stars with effective temperatures 4000 K ≤ T eff ≤ 5000 K and metal abundances ?4 ≤ Fe/H] ≤ 0. The dependence of departures from LTE on atmospheric parameters has been analyzed. We present the non-LTE abundance corrections for 28 Ca I lines, 42 Ti I lines, 54 Ti II lines, and 262 Fe I lines and a three-dimensional interpolation code to obtain the non-LTE correction online for an individual line and specified atmospheric parameters. |
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