Inelastic Processes in Strontium-Hydrogen Collisions and Their Impact on Non-LTE Calculations

Autor: Svetlana A. Yakovleva, Andrey K. Belyaev, Lyudmila I. Mashonkina

Publikováno v: Atoms, Vol 10, Iss 1, p 33 (2022)

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 SrH are

Externí odkaz: https://doaj.org/article/7e3aa83e74c049b08f6f2d1a73a3643b

Atomic data on inelastic processes in boron–hydrogen collisions with accounting for fine structure

Autor: Yaroslav V Voronov, Svetlana A Yakovleva, Andrey K Belyaev

Publikováno v: Monthly Notices of the Royal Astronomical Society. 520:107-112

This paper reports the results of investigations of inelastic processes in B + H and B+ + H− collisions with accounting for the fine structure. The calculations of the cross-sections and rate coefficients for excitation, de-excitation, ion-pair for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ca480ce2a223c4ef1bec0484c977d03
https://doi.org/10.1093/mnras/stad112

Solar oxygen abundance

Autor: Maria Bergemann, Andrey K. Belyaev, Yaroslav V. Voronov, Richard Hoppe, S. A. Yakovleva, Monika Ellwarth, Manuel A. Bautista, Mats Carlsson, Ekaterina Semenova, Ansgar Reiners, Lyudmila Mashonkina, Ahmad Nemer, Jorrit Leenaarts

Publikováno v: Bergemann, M, Hoppe, R, Semenova, E, Carlsson, M, Yakovleva, S A, Voronov, Y V, Bautista, M, Nemer, A, Belyaev, A K, Leenaarts, J, Mashonkina, L, Reiners, A & Ellwarth, M 2021, ' Solar oxygen abundance ', Monthly Notices of the Royal Astronomical Society, vol. 508, no. 2, pp. 2236-2253 . https://doi.org/10.1093/mnras/stab2160

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) calculations w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12dc907208d4f6ff047230d272373e17
https://doi.org/10.1093/mnras/stab2160

Influence of Collisions with Hydrogen Atoms on Non-LTE Effects for K I and Ca II in Stellar Atmospheres

Autor: Andrey K. Belyaev, S. A. Yakovleva, Tatyana Sitnova, M. D. Neretina, Lyudmila Mashonkina

Publikováno v: Astronomy Letters. 46:621-629

We have constructed a new K I model atom using currently available atomic data. We have performed calculations for K I by abandoning the assumption of local thermodynamic equilibrium (non-LTE) for the Sun and three moderately metal-poor dwarf stars.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eaafc2a450fbdaf5482675088e87da36
https://doi.org/10.1134/s1063773720090054

Isotopic effects in low-energy lithium-hydrogen collisions

Autor: Yaroslav V. Voronov, Andrey K. Belyaev

Publikováno v: Physical Review A. 104

The cross sections and rate coefficients for the inelastic processes of mutual neutralization, ion-pair formation, and (de)-excitation in lithium-hydrogen collisions are calculated based on the ab initio electronic structure [J. Phys. B: At. Mol. Opt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::701cb50103e6d4c3a5962ded091fd707
https://doi.org/10.1103/physreva.104.022812