近红外晚型恒星模板Gemini光谱库及其在速度色散测量中的应用
The Gemini spectral library of near-IR late type stellar templates and its application for velocity dispersion measurements
摘要：
我们提供了一个近红外波段2.15- 2.42 μ m、分辨率R=5300-5900的晚期光谱型恒星模板光谱库，用于支持外星系恒星运动学研究，如直接测定附近活动（或非活动）星系中超大质量黑洞的质量。高光谱分辨率和国家的最先进的仪器，可在8米级望远镜相结合，使环核恒星运动学的分析，使用近红外CO波段头的最常用的技术之一，这样的研究，这个库的目的是提供支持数据集所需的更高的光谱分辨率和更大的光谱覆盖范围，目前实现了现代近红外光谱仪。运动学分析的应用程序的例子给出了与两个双子仪器获得的数据，但模板可以很容易地调整使用与其他近红外光谱仪在类似或较低的分辨率。示例数据集也被用来重新审视的“模板失配”的影响和依赖的速度色散值从拟合过程中获得的恒星模板的特性。该图书馆的电子版可从Gemini网页上查阅（链接见上文）。
英文摘要：
We present a spectroscopic library of late spectral type stellar templates in the near-IR range 2.15-2.42microns, at R=5300-5900 resolution, oriented to support stellar kinematics studies in external galaxies, such as the direct determination of the masses of supermassive black-holes in nearby active (or non-active) galaxies. The combination of high spectral resolution and state-of-the-art instrumentation available in 8-m class telescopes has made the analysis of circumnuclear stellar kinematics using the near-IR CO band heads one of the most used techniques for such studies, and this library aims to provide the supporting datasets required by the higher spectral resolution and larger spectral coverage currently achieved with modern near-IR spectrographs. Examples of the application for kinematical analysis are given for data obtained with two Gemini instruments, but the templates can be easily adjusted for use with other near-IR spectrographs at similar or lower resolution. The example datasets are also used to revisit the "template mismatch" effect and the dependence of the velocity dispersion values obtained from the fitting process with the characteristics of the stellar templates. The library is available in electronic form from the Gemini web pages (link above).
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