Speaker
Jonas Klevas
(Max Planck Institute for Astronomy, Heidelberg, Germany; Institute of Theoretical Physics and Astronomy (ITPA), Vilnius, Lithuania)
Description
To interpret stellar spectra 1D hydrostatic model atmospheres are most often used as a compromise between accuracy and computational cost. However, such models do not treat convection accurately and rely on approximating it with varying degrees of success. We present a new grid of 3D hydrodynamic CO5BOLD model atmospheres and use it with 3D non-equilibrium radiative transfer code MULTI3D to investigate whether accurate treatment of both hydrodynamics and radiative transfer can explain anomalies in abundance estimates in red giants of globular clusters for Mg and Al spectral lines, which were obtained with simpler 1D hydrostatic model atmospheres assuming local thermodynamic equilibrium.
Primary author
Jonas Klevas
(Max Planck Institute for Astronomy, Heidelberg, Germany; Institute of Theoretical Physics and Astronomy (ITPA), Vilnius, Lithuania)
Co-authors
Arūnas Kučinskas
(Institute of Theoretical Physics and Astronomy (ITPA), Vilnius, Lithuania)
Hans-Günter Ludwig
(Heidelberg University, Heidelberg, Germany)
Maria Bergemann
(Max Planck Institute for Astronomy, Heidelberg, Germany; Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark)
Philipp Eitner
(Max Planck Institute for Astronomy; Heidelberg University)
Richard Hoppe
(Max Planck Institute for Astronomy, Heidelberg, Germany; Heidelberg University, Heidelberg, Germany)
