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NGC 1866: a milestone for understanding the chemical evolution of stellar populations in the LMC
A. Mucciarelli, S. Cristallo, E. Brocato +9
We present new FLAMES@VLT spectroscopic observations of 30 stars in the field of the LMC stellar cluster NGC 1866. NGC 1866 is one of the few young and massive globular cluster tha…
The solar photospheric abundance of zirconium
Elisabetta Caffau, Rosanna Faraggiana, Hans-Günter Ludwig +2
Zirconium (Zr), together with strontium and yttrium, is an important element in the understanding of the Galactic nucleosynthesis. In fact, the triad Sr-Y-Zr constitutes the first…
Chemical abundances in metal-poor giants: limitations imposed by the use of classical 1D stellar atmosphere models
V. Dobrovolskas, A. Kučinskas, H. -G. Ludwig +3
In this work we have used 3D hydrodynamical (CO5BOLD) and 1D hydrostatic (LHD) stellar atmosphere models to study the importance of convection and horizontal temperature inhomogene…
3D hydrodynamical CO5BOLD model atmospheres of late-type giants: chemical abundances from molecular lines
A. Ivanauskas, A. Kucinskas, H. -G. Ludwig +1
We investigate the influence of convection on the formation of molecular spectral lines in the atmospheres of late-type giants. For this purpose we use the 3D hydrodynamical CO5BOL…
GYES, a multifibre spectrograph for the CFHT
P. Bonifacio, S. Mignot, J. -L. Dournaux +38
We have chosen the name of GYES, one of the mythological giants with one hundred arms, offspring of Gaia and Uranus, for our instrument study of a multifibre spectrograph for the p…
Cu I resonance lines in turn-off stars of NGC 6752 and NGC 6397. Effects of granulation from CO5BOLD models
Piercarlo Bonifacio, Elisabetta Caffau, Hans-Günter Ludwig
Context. Copper is an element whose interesting evolution with metallicity is not fully understood. Observations of copper abundances rely on a very limited number of lines, the st…