S. A. Yakovleva
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View article: 3D NLTE modelling of Y and Eu
3D NLTE modelling of Y and Eu Open
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 highly magnetised rapidly rotating massive stars. Aims . We mea…
View article: The Features of Magnetotransport Properties of the Mn Δ-Doped Gaas Structure with Multiple Conduction Channels
The Features of Magnetotransport Properties of the Mn Δ-Doped Gaas Structure with Multiple Conduction Channels Open
View article: Theoretical study of inelastic processes in collisions of Y and Y+ with hydrogen atom
Theoretical study of inelastic processes in collisions of Y and Y+ with hydrogen atom Open
Utilizing a simplified quantum model approach, the low-energy inelastic collision processes between yttrium atoms (ions) and hydrogen atoms have been studied. Rate coefficients corresponding to the mutual neutralization, ion-pair formation…
View article: Theoretical Study of Inelastic Processes in Collisions of Y and Y$^+$ with Hydrogen Atom
Theoretical Study of Inelastic Processes in Collisions of Y and Y$^+$ with Hydrogen Atom Open
Utilizing a simplified quantum model approach, the low-energy inelastic collision processes between yttrium atoms (ions) and hydrogen atoms have been studied. Rate coefficients corresponding to the mutual neutralization, ion-pair formation…
View article: Atomic data on inelastic collisional process for YH
Atomic data on inelastic collisional process for YH Open
The cross sections and rate coefficients for inelastic processes in low-energy collisions of yttrium and hydrogen atoms and ions are calculated. Three ionic states of Y+ + H− are considered. Calculations of non-adiabatic nuclear dynamics i…
View article: 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
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 Open
We present a new model atom of Zn i-Zn ii based on the most up-to-date photoionization cross-sections, electron-impact excitation rates, and rate coefficients for the Zn i + H i and Zn ii + H− collisions. The latter were calculated using t…
View article: Inelastic Processes in Strontium-Hydrogen Collisions and Their Impact on Non-LTE Calculations
Inelastic Processes in Strontium-Hydrogen Collisions and Their Impact on Non-LTE Calculations Open
Inelastic processes rate coefficients for low-energy Sr + H, Sr+ + H−, Sr+ + H, and Sr2+ + H− collisions are calculated using the multichannel quantum model approach. A total of 31 scattering channels of SrH+ and 17 scattering channels of …
View article: Inelastic processes in strontium-hydrogen collisions and their impact on\n non-LTE calculations
Inelastic processes in strontium-hydrogen collisions and their impact on\n non-LTE calculations Open
Inelastic processes rate coefficients for low-energy Sr + H, Sr$^+$ + H$^-$,\nSr$^+$ + H and Sr$^{2+}$ + H$^-$ collisions are calculated using multichannel\nquantum model approach. 31 scattering channels of SrH$^+$ and 17 scattering\nchann…
View article: Inelastic processes in strontium-hydrogen collisions and their impact on non-LTE calculations
Inelastic processes in strontium-hydrogen collisions and their impact on non-LTE calculations Open
Inelastic processes rate coefficients for low-energy Sr + H, Sr$^+$ + H$^-$, Sr$^+$ + H and Sr$^{2+}$ + H$^-$ collisions are calculated using multichannel quantum model approach. 31 scattering channels of SrH$^+$ and 17 scattering channels…
View article: Inelastic Processes in Nickel–Hydrogen Collisions
Inelastic Processes in Nickel–Hydrogen Collisions Open
The cross sections and rate coefficients for inelastic processes in low-energy collisions of nickel atoms and positive ions with hydrogen atoms and negative ions are calculated for the collisional energy range 10 −4 –100 eV and for the tem…
View article: The formation of the Milky Way halo and its dwarf satellites: A NLTE–1D abundance analysis. V. The Sextans galaxy
The formation of the Milky Way halo and its dwarf satellites: A NLTE–1D abundance analysis. V. The Sextans galaxy Open
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) and the non-local thermodynamic equilibrium (NLTE) abundance…
View article: Solar oxygen abundance
Solar oxygen abundance Open
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 used to perform Non-Local Thermodynamic Equilibrium (NLTE) cal…
View article: Solar oxygen abundance
Solar oxygen abundance Open
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 used to perform non-local thermodynamic equilibrium (NLTE) cal…
View article: Cobalt-Hydrogen Atomic and Ionic Collisional Data
Cobalt-Hydrogen Atomic and Ionic Collisional Data Open
Rate coefficients for inelastic processes in low-energy Co + H, Co + + H − , Co + + H , and Co 2 + + H − collisions are estimated using the quantum simplified model. Considerations include 44 triplet and 55 quintet molecular states of CoH,…
View article: Observational constraints on the origin of the elements
Observational constraints on the origin of the elements Open
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 abundances of various atomic species. To achieve this, we hav…
View article: Observational constraints on the origin of the elements II. 3D non-LTE formation of Ba ii lines in the solar atmosphere
Observational constraints on the origin of the elements II. 3D non-LTE formation of Ba ii lines in the solar atmosphere Open
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 abundances of various atomic species. To achieve this, we hav…
View article: Observational constraints on the origin of the elements
Observational constraints on the origin of the elements Open
Manganese (Mn) is a key Fe-group element, commonly employed in stellar population and nucleosynthesis studies to explore the role of SN Ia. We have developed a new non-local thermodynamic equilibrium (NLTE) model of Mn, including new photo…
View article: Observational constraints on the origin of the elements. I. 3D NLTE formation of Mn lines in late-type stars
Observational constraints on the origin of the elements. I. 3D NLTE formation of Mn lines in late-type stars Open
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 thermodynamic equilibrium (NLTE) model of Mn, including new phot…
View article: On the origin of the elements. I. 3D NLTE formation of Mn lines in late-type stars
On the origin of the elements. I. 3D NLTE formation of Mn lines in late-type stars Open
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 thermodynamic equilibrium (NLTE) model of Mn, including new phot…
View article: Data for: Inelastic processes in low-energy iron--hydrogen collisions
Data for: Inelastic processes in low-energy iron--hydrogen collisions Open
Rate coefficients in cm^3/s for inelastic Fe + H and Fe^+ + H^- collisions for temperatures from T = 1000 K to T = 10000 K.
View article: Atomic Data on Inelastic Processes in Calcium–Hydrogen Collisions
Atomic Data on Inelastic Processes in Calcium–Hydrogen Collisions Open
Inelastic cross sections and rate coefficients in Ca + H and Ca + + H − collisions for all transitions between the 17 lowest covalent states plus one ionic molecular state are calculated based on the most recent ab initio adiabatic potenti…
View article: Inelastic processes in collisions of lithium positive ions with hydrogen anions and atoms
Inelastic processes in collisions of lithium positive ions with hydrogen anions and atoms Open
\nInelastic processes in the low-energy collisions Li3+ + H−, Li2+ + H, Li2+ + H- and Li+ + H are investigated for all collisional channels with the excited ionic lithium states Li2+ (nl) and Li+ (1s nl) up to and including the correspondi…
View article: Estimating inelastic heavy-particle – hydrogen collision data
Estimating inelastic heavy-particle – hydrogen collision data Open
Aims. A simplified model is derived for estimating rate coefficients for inelastic processes in low-energy collisions of heavy particles with hydrogen, in particular, the rate coefficients with high and moderate values. Such processes are …
View article: Data on inelastic processes in low-energy potassium-hydrogen and rubidium-hydrogen collisions
Data on inelastic processes in low-energy potassium-hydrogen and rubidium-hydrogen collisions Open
Two sets of rate coefficients for low-energy inelastic potassium-hydrogen and rubidium-hydrogen collisions were computed for each collisional system based on two model electronic structure calculations, performed by the quantum asymptotic …
View article: Estimating inelastic heavy-particle–hydrogen collision data
Estimating inelastic heavy-particle–hydrogen collision data Open
\n Aims. A simplified model is derived for estimating rate coefficients for inelastic processes in low-energy collisions of heavy particles with hydrogen, in particular, the rate coefficients with high and moderate values. Such processes a…
View article: Atomic data on inelastic processes in low-energy beryllium-hydrogen collisions
Atomic data on inelastic processes in low-energy beryllium-hydrogen collisions Open
Aims. Inelastic processes in low-energy Be + H and Be+ + H− collisions are treated for the states from the ground and up to the ionic state with the aim to provide rate coefficients needed for non-local thermodynamic equilibrium (non-LTE) …
View article: Model estimates of inelastic calcium-hydrogen collision data for non-LTE stellar atmospheres modeling
Model estimates of inelastic calcium-hydrogen collision data for non-LTE stellar atmospheres modeling Open
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