110 citations · 380 across the 7 of their papers we have counts for
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Observational constraints on the origin of the elements II. 3D non-LTE formation of Ba ii lines in the solar atmosphere
A. J. Gallagher, M. Bergemann, R. Collet +5
Context. The pursuit of more realistic spectroscopic modelling and consistent abundances has led us to begin a new series of papers designed to improve current solar and stellar ab…
Influence of inelastic collisions with hydrogen atoms on the non-LTE line formation for Fe I and Fe II in the 1D model atmospheres of late-type stars
Lyudmila Mashonkina, Tatyana Sitnova, Svetlana A. Yakovleva +1
Iron plays a crucial role in studies of late-type stars. In their atmospheres, Fe I is the minority species and its lines are subject to the departures from LTE. In contrast, one b…
Even-to-Odd Barium Isotope Ratio in Selected Galactic Halo Stars
Lyudmila Mashonkina, Andrey K. Belyaev
We have updated the Ba II model atom by taking into account the H I impact excitation with the rate coefficients from the quantum-mechanical calculations of Belyaev and Yakovleva (…
Observational constraints on the origin of the elements. I. 3D NLTE formation of Mn lines in late-type stars
Maria Bergemann, Andrew J. Gallagher, Philipp Eitner +9
Manganese (Mn) is a key Fe-group elements, commonly employed in stellar population and nucleosynthesis studies to explore the role of SN Ia. We have developed a new non-local therm…
Ca line formation in late-type stellar atmospheres: I. The model atom
Y. Osorio, K. Lind, P. S. Barklem +2
Context. Departures from local thermodynamic equilibrium (LTE) distort the calcium abundance derived from stellar spectra in various ways, depending on the lines used and the stell…