8 citations · 14 across the 2 of their papers we have counts for
4 papers · 1 filter
Overview of the lithium problem in metal-poor stars and new results on 6Li
Roger Cayrel, Matthias Steffen, Piercarlo Bonifacio +2
Two problems are discussed here. The first one is the 0.4 dex discrepancy between the 7Li abundance derived from the spectra of metal-poor halo stars on the one hand, and from Big…
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.…
Radiation-hydrodynamics simulations of surface convection in low-mass stars: connections to stellar structure and asteroseismology
Hans-G. Ludwig, Elisabetta Caffau, Arunas Kucinskas
Radiation-hydrodynamical simulations of surface convection in low-mass stars can be exploited to derive estimates of i) the efficiency of the convective energy transport in the ste…
The forbidden 1082 nm line of sulphur: the photospheric abundance of sulphur in the Sun and 3D effects
Elisabetta Caffau, Hans-Guenter Ludwig
Sulphur is an element which is formed in the alpha-process and is easily measured in the gaseous phase in external galaxies. Since it does not form dust, it is the preferred indica…