874 citations · 3k across the 46 of their papers we have counts for
4 papers · 1 filter
Lithium spectral line formation in stellar atmospheres. The impact of convection and NLTE effects
J. Klevas, A. Kučinskas, M. Steffen +2
Different simplified approaches are used to account for the non-local thermodynamic equilibrium (NLTE) effects with 3D hydrodynamical model atmospheres. In certain cases, chemical…
The photospheric solar oxygen project: IV. 3D-NLTE investigation of the 777 nm triplet lines
M. Steffen, D. Prakapavičius, E. Caffau +5
The solar photospheric oxygen abundance is still widely debated. Adopting the solar chemical composition based on the "low" oxygen abundance, as determined with the use of three-di…
A three-dimensional hydrodynamical line profile analysis of iron lines and barium isotopes in HD140283
A. J. Gallagher, H. -G. Ludwig, S. G. Ryan +1
Heavy-elements, i.e. those beyond the iron peak, mostly form via two neutron capture processes: the s- and r-process. Metal-poor stars should contain fewer isotopes that form via t…
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. IV. Oxygen diagnostics in extremely metal-poor red giants with infrared OH lines
V. Dobrovolskas, A. Kučinskas, P. Bonifacio +4
Context. Although oxygen is an important tracer of Galactic chemical evolution, measurements of its abundance in the atmospheres of the oldest Galactic stars are still scarce and r…