SPADES：恒星参数测定软件
SPADES: Stellar Parameters Determination Software
摘要：
上下文随着越来越多的光谱数据被中高分辨率多目标光谱仪提供，更多的自动恒星参数确定软件正在开发中。所收集的光谱的质量也允许确定元素丰度。目标。SPADES是一个自动化软件，用于确定：径向速度（Vr），有效温度（Teff），表面重力（log g），金属丰度（[Fe/H]），最重要的是，单个丰度。在第一个版本中，它的目标是分析中F-G矮星，但它的目的是发展到分析任何类型的单星。方法. SPADES依靠逐线建模来确定恒星参数。结果利用蒙特卡罗方法对SPADES的内部系统误差和随机误差进行了模拟计算，并通过分析地面实测光谱对SPADES的外部系统误差进行了估算。例如，通过模拟Giraffe装置HR 13和HR 14 B，用Teff = 5800 K，log g = 4.5，[Fe/H] = 0.0 dex和信噪比（S/N）为100的矮星的合成光谱，恢复了恒星参数，没有明显的偏差，Teff的1-σ精度为8 K，log g的1-σ精度为0.05，[Fe/H]为0.009，[Ti/Fe]为0.003，[Ni/Fe]为0.01。
英文摘要：
Context. As increasingly more spectroscopic data are being delivered by medium- and high-resolving power multi-object spectrographs, more automatic stellar parameter determination softwares are being developed. The quality of the spectra collected also allows the determination of elemental abundances. Aims. SPADES is an automated software for determining: the radial velocity (Vr), the effective temperature (Teff), the surface gravity (log g), the metallicity ([Fe/H]), and most importantly, the individual abundances. In this first version it is targeted on the analysis of mid-F-G dwarfs, but is meant to evolve to analyze any type of single stars. Methods. SPADES relies on a line-by-line modeling to determine the stellar parameters. Results. The internal systematic and random errors of SPADES were assessed by Monte Carlo method simulations with synthetic spectra and the external systematic errors by analysing real ground-based observed spectra. For example, by simulating the Giraffe setups HR13 and HR14B with synthetic spectra for a dwarf with Teff = 5800 K, log g = 4.5, [Fe/H] = 0.0 dex and with a signal-tonoise ratio (S/N) of 100, the stellar parameters are recovered with no significant bias and with 1-σ precisions of 8 K for Teff, 0.05 for log g, 0.009 for [Fe/H], 0.003 for [Ti/Fe] and 0.01 for [Ni/Fe].
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