Browsing Institutt for teoretisk astrofysikk by Author "Yakovleva, Svetlana A."

Now showing items 1-3 of 3

  • Observational constraints on the origin of the elements: I. 3D NLTE formation of Mn lines in late-type stars 
    Bergemann, Maria; Gallagher, Andrew J.; Eitner, Philipp; Bautista, Manuel; Collet, Remo; Yakovleva, Svetlana A.; Mayriedl, Anja; Plez, Bertrand; Carlsson, Mats; Leenaarts, Jorrit; Belyaev, Andrey K.; Hansen, Camilla (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    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, ...
  • Observational constraints on the origin of the elements: II. 3D non-LTE formation of Ba II lines in the solar atmosphere 
    Gallagher, Andrew J.; Bergemann, Maria; Collet, Remo; Plez, Bertrand; Leenaarts, Jorrit; Carlsson, Mats Per-Olof; Yakovleva, Svetlana A.; Belyaev, Andrey K. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    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 ...
  • Solar oxygen abundance 
    Bergemann, Maria; Hoppe, Richard; Semenova, Ekaterina; Carlsson, Mats; Yakovleva, Svetlana A.; Voronov, Yaroslav V.; Bautista, Manuel; Nemer, Ahmad; Belyaev, Andrey K.; Leenaarts, Jorrit; Mashonkina, Lyudmila; Reiners, Ansgar; Ellwarth, Monika (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    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 ...