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Departures from lte in chemically stratified atmospheres

  • R. Monier, B. Smalley, G. Wahlgren, Ph. Stee and L. Mashonkina (a1)...

Abstract

Two astrophysical problems are reviewed where non-LTE line formation for the selected atoms is considered in a chemically stratified atmosphere and this leads to better interpretation of observed data. These are an origin of the Mn ii emission lines in the 3He and HgMn stars and a violation of the ionization equilibrium between the second and first ions of rare-earth elements in rapidly oscillating chemically peculiar stars.

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