3 papers
astro-ph.SR2026
The non-LTE abundances of magnesium and yttrium and asteroseismic ages for the chemical clock calibration
Š. Mikolaitis, G. Tautvaišienė, E. Pakštienė +11
Building on our previous study, which demonstrated the importance of accounting for departures from local thermodynamic equilibrium (LTE) in elemental-abundance determinations and…
astro-ph.SR2025
Chromospherically active stars: Lithium and CNO abundances in northern RS CVn stars
B. Bale, G. Tautvaisiene, R. Minkeviciute +4
Aims: We carried out a detailed investigation of Lithium and CNO abundances, including carbon isotope ratios, in RS CVn stars to assess the role of magnetic activity in the mixing…
astro-ph.SR2025
Chromospherically active stars: Chemical composition of photospheres in 20 RS CVn stars
B. Bale, G. Tautvaisiene, R. Minkeviciute +4
Context. Various element transport processes modify the photospheric chemical composition of low-mass stars during their evolution. The most prominent one is the first dredge-up th…