20 citations · 22 across the 6 of their papers we have counts for
18 papers · 1 filter
Spectral analyses of three carbon-enhanced metal-poor stars
N. T. Behara, Piercarlo Bonifacio, Hans-Guenter Ludwig +3
We are conducting a high-resolution follow-up of candidate EMP stars extracted from the Sloan Digital Sky Survey (SDSS; York et al. 2000) using UVES at the VLT. Three of the progra…
Extremely metal-poor stars from the SDSS
H. -G. Ludwig, P. Bonifacio, E. Caffau +3
We give a progress report about the activities within the CIFIST Team related to the search for extremely metal-poor stars in the Sloan Digital Sky Survey's spectroscopic catalog.…
The solar photospheric abundance of hafnium and thorium. Results from CO5BOLD 3D hydrodynamic model atmospheres
Elisabetta Caffau, L. Sbordone, H. -G. Ludwig +3
Context: The stable element hafnium (Hf) and the radioactive element thorium (Th) were recently suggested as a suitable pair for radioactive dating of stars. The applicability of t…
The solar photospheric abundance of phosphorus: results from co5bold 3D model atmospheres
Elisabetta Caffau, Matthias Steffen, Luca Sbordone +2
aims: We determine the solar abundance of phosphorus using co5bold 3D hydrodynamic model atmospheres. method: High resolution, high signal-to-noise solar spectra of the PI lines of…
Variations in the lithium abundances of turn off stars in the globular cluster 47 Tuc
Piercarlo Bonifacio, Luca Pasquini, Paolo Molaro +7
aims: Our aim is to determine Li abundances in TO stars of the Globular Cluster 47 Tuc and test theories about Li variations among TO stars. method: We make use of high resolution…
The exotic chemical composition of the Sagittarius dwarf Spheroidal galaxy
L. Sbordone, P. Bonifacio, R. Buonanno +3
The Sagittarius dwarf Spheroidal galaxy is the nearest neighbor of the Milky Way. Moving along a short period quasi-polar orbit within the Halo, it is being destroyed by the tidal…