论文标题
非LTE辐射转移带有Turbospectrum
Non-LTE Radiative Transfer with Turbospectrum
论文作者
论文摘要
从基本恒星参数的分析到星系中系外行星和恒星种群的研究，需要在各种天文学研究中进行恒星光谱的物理现实模型。在这里，我们提出了广泛使用的辐射传输代码涡轮光谱的新版本，我们以非本地热力学平衡（NLTE）中多个化学元素的线的能力进行更新。我们使用一维MARCS大气模型和3D辐射流动力学模拟恒星表面对流的3D辐射 - 氢动力学模拟，在分析金属材料和Gaia FGK基准恒星的大量分析中使用该代码。我们表明，新的更现实的模型为观察到的数据提供了更好的描述，并使程序和相关的微物理学数据公开可用，包括H，O，O，O，NA，MG，SI，CA，CA，TI，TI，MN，MN，MN，FE，FE，FE，CO，CO，NI，NI，SR和BA的NLTE离开系数的网格。
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 with the capacity 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 one-dimensional 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 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.
