论文标题
3D模型大气的光谱插值
Interpolation of spectra from 3D model atmospheres
论文作者
论文摘要
使用恒星表面对流的3D流体动力学模拟在模型大气上是计算昂贵的。尽管这些模型已经有很长时间了，但由于缺乏广泛的模拟和相关光谱网格，它们的使用受到限制。我们的目标是提供一种可以应用于1D和3D模型的方法来插值光谱，并以社区可用的代码实现。该工具将在恒星光谱的分析中常规使用3D模型大气。}我们已经开发了一种代码，该代码利用径向基函数来插入84个三维模型大气的CIFIST网格中包含的光谱。先前使用代码ASS $ε$ t进行了流体动力学模拟上的光谱合成。我们为社区提供的3D光谱插值制作了工具。该代码为给定波长间隔提供了插值光谱和插值误差，以及有效温度，表面重力和金属性的组合。此外，它可选地提供RMS的图形表示和1D和3D光谱之间的平均值，以及跨参数空间插值光谱中误差的地图。
The use of 3D hydrodynamical simulations of stellar surface convection for model atmospheres is computationally expensive. Although these models have been available for quite some time, their use is limited because of the lack of extensive grids of simulations and associated spectra. Our goal is to provide a method to interpolate spectra that can be applied to both 1D and 3D models, and implement it in a code available to the community. This tool will enable the routine use of 3D model atmospheres in the analysis of stellar spectra.} We have developed a code that makes use of radial basis functions to interpolate the spectra included in the CIFIST grid of 84 three-dimensional model atmospheres. Spectral synthesis on the hydrodynamical simulations was previously performed with the code ASS$ε$T. We make a tool for the interpolation of 3D spectra available to the community. The code provides interpolated spectra and interpolation errors for a given wavelength interval, and a combination of effective temperature, surface gravity, and metallicity. In addition, it optionally provides graphical representations of the RMS and mean ratio between 1D and 3D spectra, and maps of the errors in the interpolated spectra across the parameter space.
