874 citations · 3k across the 46 of their papers we have counts for
8 papers · 1 filter
Abundances of lithium, oxygen, and sodium in the turn-off stars of Galactic globular cluster 47 Tuc
V. Dobrovolskas, A. Kučinskas, P. Bonifacio +7
We aim to determine abundances of Li, O and Na in a sample of of 110 turn-off (TO) stars, in order to study the evolution of light elements in this cluster and to put our results i…
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres
P. -E. Tremblay, H. -G. Ludwig, M. Steffen +1
We present the first grid of mean three-dimensional (3D) spectra for pure-hydrogen (DA) white dwarfs based on 3D model atmospheres. We use CO5BOLD radiation-hydrodynamics 3D simula…
Granulation properties of giants, dwarfs, and white dwarfs from the CIFIST 3D model atmosphere grid
P. -E. Tremblay, H. -G. Ludwig, B. Freytag +2
3D model atmospheres for giants, dwarfs, and white dwarfs, computed with the CO5BOLD code and part of the CIFIST grid, have been used for spectroscopic and asteroseismic studies. U…
Micro- and macroturbulence predictions from CO5BOLD 3D stellar atmospheres
M. Steffen, E. Caffau, H. -G. Ludwig
We present an overview of the current status of our efforts to derive the microturbulence and macroturbulence parameters (ximic and ximac) from the CIFIST grid of CO5BOLD 3D model…
Molecular bands in extremely metal-poor stars. Granulation effects
Piercarlo Bonifacio, Elisabetta Caffau, Hans-Günter Ludwig +4
The bands of diatomic molecules are important abundance indicators, especially in metal-poor stars, where they are still measurable in metallicity regimes where the atomic lines of…
The influence of convection on the atmospheric structures and observable properties of red giant stars
A. Kucinskas, H. -G. Ludwig, M. Steffen +5
During the recent years significant progress has been made in the modeling of red giant atmospheres with the aid of 3D hydrodynamical model atmosphere codes. In this contribution w…