sMILES: a library of semi-empirical MILES stellar spectra with variable [α/Fe] abundances
sMILES: a library of semi-empirical MILES stellar spectra with variable [α/Fe] abundances
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DOI：
10.1093/mnras/stab1001
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发表时间：
2021-04
影响因子：
4.8
通讯作者：
A. T. Knowles;A. Sansom;Carlos Allende Prieto;A. Vazdekis
中科院分区：
文献类型：
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作者：
A. T. Knowles;A. Sansom;Carlos Allende Prieto;A. Vazdekis
我们提出了一个新的图书馆的半经验恒星光谱的基础上，经验中等分辨率艾萨克牛顿图书馆的经验光谱（MILES）库。一个新的，高分辨率的理论恒星光谱库的产生，是专门设计用于恒星人口的研究。我们测试了这些模型在其整个波长范围内对其他模型库，并发现合理的协议，由于大气α元素的变化，称为差分修正光谱变化的预测。我们还测试模型对MILES和MaStar库的经验恒星光谱，也发现合理的协议，从以前的工作预期。然后，我们使用新的理论恒星光谱的丰度模式预测差分校正英里光谱创建半经验英里（sMILES）星星光谱与丰度模式，不同于那些存在于银河系。最终的结果是五个家族的801 sMILES恒星，[α/Fe]丰度范围从-0.20到0.60 dex，MILES分辨率（FWHM = $2.5\，$100）和波长覆盖范围（$3540.5\！-\！7409.6\，$100）。我们公开了sMILES库。
We present a new library of semi-empirical stellar spectra that is based on the empirical Medium resolution Isaac Newton Library of Empirical Spectra (MILES) library. A new, high-resolution library of theoretical stellar spectra is generated that is specifically designed for use in stellar population studies. We test these models across their full wavelength range against other model libraries and find reasonable agreement in their predictions of spectral changes due to atmospheric α-element variations, known as differential corrections. We also test the models against the MILES and MaStar libraries of empirical stellar spectra and also find reasonable agreements, as expected from previous work. We then use the abundance pattern predictions of the new theoretical stellar spectra to differentially correct MILES spectra to create semi-empirical MILES (sMILES) star spectra with abundance patterns that differ from those present in the Milky Way. The final result is five families of 801 sMILES stars with [α/Fe] abundances ranging from −0.20 to 0.60 dex at MILES resolution (FWHM = $2.5\,$Å) and wavelength coverage ($3540.5\!-\!7409.6\,$Å). We make the sMILES library publicly available.