Differences between metallicity measurements of dwarfs and giants belonging to the same open clusters, as envisaged, would have tremendous implications, among other things, on the planet formation theory and on the stellar populations in the Milky Way. They also have a high importance on their own right, as they may indicate either that there are important processes presently not taken into account in modelling the atmosphere of evolved stars, or that the composition of the stars changes when they leave the main sequence. However, they have not yet been evaluated based on solid and conclusive data. We review literature data, employing different models and line lists, in order to investigate the extent, the origin, and the nature of the aforementioned differences.
GREAT-ESF Workshop: Stellar Atmospheres in the Gaia Era
Journal of Physics: Conference Series
A. Lobel, J.-P. De Greve, W. van Rensbergen
Volume 328, Number 1, Page 012007_1