145 citations · 465 across the 13 of their papers we have counts for
13 papers
Non-LTE corrections for determinations of europium abundances in F-G-K stars in a broad metallicity range
L. I. Mashonkina, S. A. Yakovleva
Europium plays a key role in studies of nucleosynthesis in the rapid (r-) process of neutron capture nuclear reactions and the evolution of the r-process element abundances in gala…
3D NLTE modelling of Y and Eu. Centre-to-limb variation and solar abundances
N. Storm, P. S. Barklem, S. A. Yakovleva +6
Context. Abundances of s- and r-process elements in Sun-like stars constrain nucleosynthesis in extreme astrophysical events, such as compact binary mergers and explosions of highl…
Theoretical Study of Inelastic Processes in Collisions of Y and Y with Hydrogen Atom
Yu Wang, Sofya Alexeeva, Feng Wang +6
Utilizing a simplified quantum model approach, the low-energy inelastic collision processes between yttrium atoms (ions) and hydrogen atoms have been studied. Rate coefficients cor…
Non-LTE abundances of zinc in different spectral type stars and the Galactic [Zn/Fe] trend based on quantum-mechanical data on inelastic processes in zinc-hydrogen collisions
T. M. Sitnova, S. A. Yakovleva, A. K. Belyaev +1
We present a new model atom of Zn I-II based on the most up-to-date photoionisation cross-sections, electron-impact excitation rates, and rate coefficients for the Zn I + H I and Z…
Inelastic processes in strontium-hydrogen collisions and their impact on non-LTE calculations
Svetlana A. Yakovleva, Andrey K. Belyaev, Lyudmila I. Mashonkina
Inelastic processes rate coefficients for low-energy Sr + H, Sr + H, Sr + H and Sr + H collisions are calculated using multichannel quantum model approach. 3…
Geometric Upper Critical Dimensions of the Ising Model
Sheng Fang, Zongzheng Zhou, Youjin Deng
The upper critical dimension of the Ising model is known to be , above which critical behavior is regarded as trivial. We hereby argue from extensive simulations that, in th…
The formation of the Milky Way halo and its dwarf satellites: A NLTE-1D abundance analysis. V. The Sextans galaxy
L. Mashonkina, Yu. V. Pakhomov, T. Sitnova +3
We present a homogeneous set of accurate atmospheric parameters for a sample of eleven very metal-poor (-3.32 <= [Fe/H] <= -2.61) stars in the Sextans dwarf spheroidal galaxy (dSph…
Solar oxygen abundance
Maria Bergemann, Richard Hoppe, Ekaterina Semenova +10
Motivated by the controversy over the surface metallicity of the Sun, we present a re-analysis of the solar photospheric oxygen (O) abundance. New atomic models of O and Ni are use…
Influence of Collisions with Hydrogen on Titanium Abundance Determinations in Cool Stars
T. M. Sitnova, S. A. Yakovleva, A. K. Belyaev +1
We performed the non-local thermodynamic equilibrium (non-LTE) calculations for Ti I-II with the updated model atom that includes quantum-mechanical rate coefficients for inelastic…
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…
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…
Charge transfer in the cold Yb + Rb collisions
Elvira R. Sayfutyarova, Alexei A. Buchachenko, Svetlana A. Yakovleva +1
Charge-transfer cold Yb + Rb collision dynamics is investigated theoretically using high-level {\it ab initio} potential energy curves, dipole moment functions and nonadiabatic…