227 citations · 2.1k across the 36 of their papers we have counts for
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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…
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…
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…
The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
G. Gilmore, S. Randich, C. C. Worley +165
The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100,000 stars, including large representat…
Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant Tau
K. Brogaard, E. Pakštienė, F. Grundahl +21
Eclipsing binary stars allow derivation of accurate and precise masses and radii. When they reside in star clusters, properties of even higher precision, along with additional info…
Search for variable stars in the northern sky:Analysis of photometric time series for 3598 stars
E. Pakštienė, R. Janulis, A. Drazdauskas +6
As extensive ground-based observations and characterisation of different variable stars are of the utmost importance in preparing optimal input catalogues for space missions, our a…
Spectroscopy of Dwarf Stars Around the North Celestial Pole
Šarūnas Mikolaitis, Gražina Tautvaišienė, Arnas Drazdauskas +5
New space missions (e.g., NASA-TESS and ESA-PLATO) will perform an analysis of bright stars in large fields of the celestial sphere searching for extraterrestrial planets. Asterose…
Variability analysis of δ Scuti candidate stars
Erika Pakštienė, Rimvydas Janulis, Gražina Tautvaišienė +5
The Hipparcos catalog contains stars suspected to be δ Scuti variables for which extensive ground-based observations and characterization of variability are necessary. Our aim was…
The Gaia-ESO Survey: open clusters in Gaia-DR1 - a way forward to stellar age calibration
S. Randich, E. Tognelli, R. Jackson +42
We describe the methodologies that, taking advantage of Gaia-DR1 and the Gaia-ESO Survey data, enable the comparison of observed open star cluster sequences with stellar evolutiona…
The AMBRE project: Iron-peak elements in the solar neighbourhood
Š. Mikolaitis, P. de Laverny, A. Recio-Blanco +3
The aim of this paper is to characterise the abundance patterns of five iron-peak elements (Mn, Fe, Ni, Cu, and Zn) for which the stellar origin and chemical evolution are still de…
The extent of mixing in stellar interiors: the open clusters Collinder 261 and Melotte 66
Arnas Drazdauskas, Gražina Tautvaišienė, Sofia Randich +3
Context: Determining carbon and nitrogen abundances in red giants provides useful diagnostics to test mixing processes in stellar atmospheres. Aims: Our main aim is to determine ca…
The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705
G. Tautvaišienė, A. Drazdauskas, Š. Mikolaitis +30
Aim of this work is to determine C, N, and O abundances in stars of Galactic open clusters of the Gaia-ESO survey and to compare the observed abundances with those predicted by cur…
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann +99
The Gaia-ESO Survey is obtaining high-quality spectroscopic data for about 10^5 stars using FLAMES at the VLT. UVES high-resolution spectra are being collected for about 5000 FGK-t…
A new procedure for defining a homogenous line-list for solar-type stars
S. G. Sousa, N. C. Santos, V. Adibekyan +9
Context. The homogenization of the stellar parameters is an important goal for large observational spectroscopic surveys, but it is very difficult to achieve it because of the dive…
C, N, O abundances and carbon isotope ratios in evolved stars of the open clusters Collinder 261 and NGC 6253
Šarūnas Mikolaitis, Gražina Tautvaišienė, Raffaele Gratton +2
Context. Investigations of abundances of carbon and nitrogen in the atmospheres of evolved stars of open clusters may provide comprehensive information on chemical composition chan…
Chemical composition of evolved stars in the open cluster NGC 2506
Šarūnas Mikolaitis, Gražina Tautvaišienė, Raffaele Gratton +2
In this study we present abundances of 12^C, 13^C, N, O and up to 26 other chemical elements in two first ascent giants and two core-helium-burning 'clump' stars of the open cluste…
Chemical composition of evolved stars in the open cluster IC 4651
Šarūnas Mikolaitis, Gražina Tautvaišienė, Raffaele Gratton +2
We present an analysis of high-resolution spectra of three core-helium-burning "clump" stars and two first ascent giants in the open cluster IC 4651. Atmospheric parameters (T_eff,…
Chemical composition of clump stars in the open cluster NGC 6134
Šarūnas Mikolaitis, Gražina Tautvaišienė, Raffaele Gratton +2
We present an analysis of high-resolution spectra of six core-helium-burning "clump" stars in the open cluster NGC 6134. Atmospheric parameters T_eff, log_g, v_t, and [Fe/H] were d…