65 citations · 133 across the 8 of their papers we have counts for
8 papers · 1 filter
Abundances of Na, Mg, and K in the atmospheres of red giant branch stars of Galactic globular cluster 47 Tucanae
A. Černiauskas, A. Kučinskas, J. Klevas +6
We study the abundances of Na, Mg, and K in the atmospheres of 32 RGB stars in the Galactic globular cluster (GGC) 47 Tuc, with the goal to investigate the possible existence of Na…
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. V. Oxygen abundance in the metal-poor giant HD 122563 from OH UV lines
D. Prakapavičius, A. Kučinskas, V. Dobrovolskas +5
Although oxygen is an important tracer of the early Galactic evolution, its abundance trends with metallicity are still relatively poorly known at [Fe/H] < -2.5. This is in part du…
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…
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…
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…
Oxygen spectral line synthesis: 3D non-LTE with CO5BOLD hydrodynamical model atmospheres
D. Prakapavicius, M. Steffen, A. Kucinskas +4
In this work we present first results of our current project aimed at combining the 3D hydrodynamical stellar atmosphere approach with non-LTE (NLTE) spectral line synthesis for a…
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars II. Spectral line formation in the atmosphere of a giant located near the RGB tip
A. Kucinskas, M. Steffen, H. -G. Ludwig +6
We investigate the role of convection in the formation of atomic and molecular lines in the atmosphere of a red giant star. For this purpose we study the formation properties of sp…
Can we trust elemental abundances derived in late-type giants with the classical 1D stellar atmosphere models?
A. Kucinskas, V. Dobrovolskas, A. Ivanauskas +5
We compare the abundances of various chemical species as derived with 3D hydrodynamical and classical 1D stellar atmosphere codes in a late-type giant characterized by T_eff=3640K,…