红外望远镜设施（IRTF）光谱库：冷星
The Infrared Telescope Facility (IRTF) Spectral Library: Cool Stars
摘要：
本文介绍了一个由210颗冷星组成的0.8 - 5微米光谱库，它是在夏威夷莫纳克亚山3.0米红外望远镜（IRTF）上用中分辨率红外光谱仪（SpeX）在R = lambda / Delta lambda ~ 2000分辨率下观测到的。这些恒星都有完善的MK光谱分类，并且大多数都局限于近太阳的金属丰度。样本包含F、G、K和M光谱类型，光度等级介于I和V之间，但也包括一些AGB、碳和S星。与其他一些光谱库相比，光谱的连续形状在数据简化过程中被测量和保留。光谱是使用2微米全天巡天（2 MASS）测光绝对通量校准的。该图书馆的潜在用途包括研究冷恒星的物理学，分类和研究嵌入的年轻星团和银河系的光学模糊区域，进化人口合成研究光学模糊区域的星系中未解决的恒星星族，以及合成测光。该图书馆的数字形式可从IRTF网站上获得。
英文摘要：
We present a 0.8 -5 micron spectral library of 210 cool stars observed at a resolving power of R = lambda / Delta lambda ~ 2000 with the medium-resolution infrared spectrograph, SpeX, at the 3.0 m NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii. The stars have well established MK spectral classifications and are mostly restricted to near-solar metallicities. The sample contains the F, G, K, and M spectral types with luminosity classes between I and V, but also includes some AGB, carbon, and S stars. In contrast to some other spectral libraries, the continuum shape of the spectra are measured and preserved in the data reduction process. The spectra are absolutely flux calibrated using Two Micron All Sky Survey (2MASS) photometry. Potential uses of the library include studying the physics of cool stars, classifying and studying embedded young clusters and optically obscured regions of the Galaxy, evolutionary population synthesis to study unresolved stellar populations in optically-obscured regions of galaxies, and synthetic photometry. The library is available in digital form from the IRTF website.
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