Non-LTE radiative transfer with Turbospectrum

被引:16
|
作者
Gerber, Jeffrey M. M. [1 ]
Magg, Ekaterina [1 ]
Plez, Bertrand [2 ]
Bergemann, Maria [1 ,4 ]
Heiter, Ulrike [3 ]
Olander, Terese [3 ]
Hoppe, Richard [1 ]
机构
[1] Max Planck Inst Astron, D-69117 Heidelberg, Germany
[2] Univ Montpellier, LUPM, CNRS, Montpellier, France
[3] Uppsala Univ, Dept Phys & Astron, Observat Astrophys, Box 516, S-75120 Uppsala, Sweden
[4] Univ Copenhagen, Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
基金
美国国家科学基金会; 欧洲研究理事会;
关键词
stars; abundances; techniques; spectroscopic; methods; observational; Sun; RELATIVE OSCILLATOR-STRENGTHS; LATE-TYPE STARS; SAMPLING MODEL ATMOSPHERES; FE-I TRANSITIONS; COOL DWARF STARS; LINE FORMATION; EFFECTIVE TEMPERATURES; PRECISION-MEASUREMENT; CHEMICAL-COMPOSITION; STELLAR EVOLUTION;
D O I
10.1051/0004-6361/202243673
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
收藏
页数:14
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