110 citations · 398 across the 9 of their papers we have counts for
12 papers · 1 filter
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…
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…