Statistical equilibrium of silicon in the atmospheres of cool stars
Proceedings of The International Astronomical Union(2014)
Abstract
The statistical equilibrium of neutral and ionized silicon in the atmospheres of cool stars is discussed. Non-local thermodynamic equilibrium effects (NLTE) are investigated. It is found that the NLTE effects for Si are important, in particular for warm metal-poor stars. For warm metal-poor stars, the NLTE abundance correction reaches similar to 0.2 dex relative to standard LTE calculations.
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Key words
abundances,late-type,line formation,Galaxy
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