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Non-LTE radiative t...
Non-LTE radiative transfer with Turbospectrum
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- Gerber, Jeffrey M. M. (author)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.
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- Magg, Ekaterina (author)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.
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- Plez, Bertrand (author)
- Univ Montpellier, LUPM, CNRS, Montpellier, France.
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- Bergemann, Maria (author)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.;Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
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- Heiter, Ulrike (author)
- Uppsala universitet,Observationell astrofysik
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- Olander, Terese (author)
- Uppsala universitet,Observationell astrofysik
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- Hoppe, Richard (author)
- Max Planck Inst Astron, D-69117 Heidelberg, Germany.
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Max Planck Inst Astron, D-69117 Heidelberg, Germany Univ Montpellier, LUPM, CNRS, Montpellier, France. (creator_code:org_t)
- 2023-01-06
- 2023
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 669
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Abstract
Subject headings
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- Physically realistic models of stellar spectra are needed in a variety of astronomical studies, from the analysis of fundamental stellar parameters, to studies of exoplanets and stellar populations in galaxies. Here we present a new version of the widely used radiative transfer code Turbospectrum, which we update so that it is able to perform spectrum synthesis for lines of multiple chemical elements in non-local thermodynamic equilibrium (NLTE). We use the code in the analysis of metallicites and abundances of the Gaia FGK benchmark stars, using 1D MARCS atmospheric models and the averages of 3D radiation-hydrodynamics simulations of stellar surface convection. We show that the new more physically realistic models offer a better description of the observed data, and we make the program and the associated microphysics data publicly available, including grids of NLTE departure coefficients for H, O, Na, Mg, Si, Ca, Ti, Mn, Fe, Co, Ni, Sr, and Ba.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars
- abundances
- techniques
- spectroscopic
- methods
- observational
- Sun
Publication and Content Type
- ref (subject category)
- art (subject category)
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