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Atomic Diffusion and Mixing in Old Stars I. VLT/FLAMES-UVES Observations of Stars in NGC 6397
A. J. Korn, F. Grundahl, O. Richard +5
We present a homogeneous photometric and spectroscopic analysis of 18 stars along the evolutionary sequence of the metal-poor globular cluster NGC 6397 ([Fe/H] = -2), from the main…
On the Use of Blanketed Atmospheres as Boundary Conditions for Stellar Evolutionary Models
Don A. VandenBerg, Bengt Edvardsson, Kjell Eriksson +1
Stellar models have been computed for stars having [Fe/H] = 0.0 and -2.0 to determine the effects of using boundary conditions derived from the latest MARCS model atmospheres. The…
A Constraint on Z_\odot from Fits of Isochrones to the Color-Magnitude Diagram of M67
Don A. VandenBerg, Bengt Gustafsson, Bengt Edvardsson +2
The mass at which a transition is made between stars that have radiative or convective cores throughout the core H-burning phase is a fairly sensitive function of Z (particularly t…
A First Study of Giant Stars in the Galactic Bulge based on Crires spectra
N. Ryde, B. Edvardsson, B. Gustafsson +1
We present our on-going work on the determination of elemental abundances of giants in the Galactic Bulge by means of infrared spectroscopy. We show a preliminarily reduced spectru…