405 citations · 4.2k across the 101 of their papers we have counts for
6 papers · 1 filter
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. III. Line formation in the atmospheres of giants located close to the base of RGB
V. Dobrovolskas, A. Kučinskas, M. Steffen +5
We utilize state-of-the-art 3D hydrodynamical and classical 1D stellar model atmospheres to study the influence of convection on the formation properties of various atomic and mole…
Isotope Spectroscopy
E. Caffau, M. Steffen, P. Bonifacio +4
The measurement of isotopic ratios provides a privileged insight both into nucleosynthesis and into the mechanisms operating in stellar envelopes, such as gravitational settling. I…
On the seismic scaling relations and
K. Belkacem, R. Samadi, B. Mosser +2
Scaling relations between asteroseismic quantities and stellar parameters are essential tools for studying stellar structure and evolution. We will address two of them, namely, the…
Spectral line asymmetries in the metal-poor red giant HD 122563: CO5BOLD predictions versus observations
J. Klevas, A. Kucinskas, H. -G. Ludwig +3
We study the influence of convection on the asymmetries and Doppler shifts of Fe I spectral lines in the metal-poor red giant HD 122563. To this end, we compute theoretical Fe I li…
Signs of atmospheric inhomogeneities in cool stars from 1D-NLTE analysis of iron lines
L. Mashonkina, H. -G. Ludwig, A. Korn +2
For the well studied halo star HD 122563 and the four stars in the globular cluster NGC 6397, we determine NLTE abundances of iron using classical plane-parallel model atmospheres.…
Fluorine Abundances of Galactic Low-Metallicity Giants
H. N. Li, H. -G. Ludwig, E. Caffau +2
With abundances and 2σ upper limits of fluorine (F) in seven metal-poor field giants, nucleosynthesis of stellar F at low metallicity is discussed. The measurements are derived fro…