Chromium: NLTE abundances in metal-poor stars and nucleosynthesis in the Galaxy
M. BergemannMax-Planck Institute for Astrophysics, Karl-Schwarzschild Str. 1 85741 Garching GermanyG. CescuttiAstronomy Unit, Department of Physics, University of Trieste, via G.B. Tiepolo 11, 34143 Trieste, Italy
2010en
ABI
Abstract
Aims. We investigate statistical equilibrium of Cr in the atmospheres of late-type stars to ascertain whether the systematic abundance discrepancy between Cr I and Cr II lines, as often found in previous work, is due to deviations from local thermodynamic equilibrium (LTE). Furthermore, we attempt to interpret the Non-LTE (NLTE) trend of [Cr/Fe] with [Fe/H] using chemical evolution models for the solar neighborhood.
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Cited by 20 references