Sodium abundances in stellar atmospheres with differing metallicities |
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Authors: | T V Mishenina V V Kovtyukh S A Korotin C Soubiran |
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Institution: | (1) Astronomical Observatory, Odessa State University, Odessa, Ukraine;(2) Observatoire de Bordeaux, Floirac, France |
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Abstract: | The non-LTE sodium abundances of 100 stars with metallicities ?3g<3.8) with Fe/H]1 do not display overabundances of sodium, and their sodium abundances do not show an anticorrelation with the oxygen abundance, in contrast to globular-cluster giants. They likewise do not show sodium-abundance variations with motion along the giant branch. No appreciable decrease in the sodium abundance was detected for dwarfs (logg>3.8) with metallicities ?2
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