Spectral diagnostics of late-type stars: Non-LTE and <3D> approach

Spectral diagnostics of late-type stars: Non-LTE and <3D> approach

We determine effective temperature, metallicity, and microturbulence for a number of well-studied late-type stars. We use the new NLTE atomic model of Fe, and discuss the results for the MARCS models, as well as for the spatial and temporal averages of full 3D hydrodynamical simulations of stellar c...

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Main Authors: Collet R., Lind K., Bergemann M., Asplund M., Magic Z.
Format: Article
Language:English
Published: EDP Sciences 2012-02-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20121905013
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spelling doaj-58450b929f524b768bd0798f2b4508e42021-08-02T09:44:32ZengEDP SciencesEPJ Web of Conferences2100-014X2012-02-01190501310.1051/epjconf/20121905013Spectral diagnostics of late-type stars: Non-LTE and <3D> approachCollet R.Lind K.Bergemann M.Asplund M.Magic Z.We determine effective temperature, metallicity, and microturbulence for a number of well-studied late-type stars. We use the new NLTE atomic model of Fe, and discuss the results for the MARCS models, as well as for the spatial and temporal averages of full 3D hydrodynamical simulations of stellar convection. It is shown that, contrary to the mean 3D models, certain limitations shall be imposed on the line formation and spectrum synthesis calculations with classical hydrostatic 1D models to obtain physically-realistic results. http://dx.doi.org/10.1051/epjconf/20121905013
collection DOAJ
language English
format Article
sources DOAJ
author Collet R.
Lind K.
Bergemann M.
Asplund M.
Magic Z.
spellingShingle Collet R.
Lind K.
Bergemann M.
Asplund M.
Magic Z.
Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
EPJ Web of Conferences
author_facet Collet R.
Lind K.
Bergemann M.
Asplund M.
Magic Z.
author_sort Collet R.
title Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
title_short Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
title_full Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
title_fullStr Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
title_full_unstemmed Spectral diagnostics of late-type stars: Non-LTE and <3D> approach
title_sort spectral diagnostics of late-type stars: non-lte and <3d> approach
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2012-02-01
description We determine effective temperature, metallicity, and microturbulence for a number of well-studied late-type stars. We use the new NLTE atomic model of Fe, and discuss the results for the MARCS models, as well as for the spatial and temporal averages of full 3D hydrodynamical simulations of stellar convection. It is shown that, contrary to the mean 3D models, certain limitations shall be imposed on the line formation and spectrum synthesis calculations with classical hydrostatic 1D models to obtain physically-realistic results.
url http://dx.doi.org/10.1051/epjconf/20121905013
work_keys_str_mv AT colletr spectraldiagnosticsoflatetypestarsnonlteand3dapproach
AT lindk spectraldiagnosticsoflatetypestarsnonlteand3dapproach
AT bergemannm spectraldiagnosticsoflatetypestarsnonlteand3dapproach
AT asplundm spectraldiagnosticsoflatetypestarsnonlteand3dapproach
AT magicz spectraldiagnosticsoflatetypestarsnonlteand3dapproach
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