NSCC --一个基于光学和红外观测的富C星分类新方案
NSCC -- A New Scheme of Classification of C-rich Stars Devised from Optical and Infrared Observations
摘要：
通过对51颗AGB碳星的分析，提出了一个新的富碳星分类系统。扩展纳入，这也代表了这个新系统的主要优点，是通常的光学指数的组合，描述的光球的对象，与新的红外线，允许解释的拱星环境的富碳恒星。这个新系统包括通常的光谱子类和$C_2$ -，j-，MS-和温度指数，以及新的SiC-（SiC/C. A.丰度估计）和$τ$ -（不透明度）指数。红外指数的数值是通过对恒星拱星包层中的辐射转移进行蒙特卡罗模拟得到的。当应用于我们的样本时，全套指数导致了一个更有效的分类系统，因为在宽光谱范围内的检查使我们能够获得碳星的完整场景。
英文摘要：
A new classification system for carbon-rich stars is presented based on an analysis of 51 AGB carbon stars through the most relevant classifying indices available. The extension incorporated, that also represents the major advantage of this new system, is the combination of the usual optical indices that describe the photospheres of the objects, with new infrared ones, which allow an interpretation of the circumstellar environment of the carbon-rich stars. This new system is presented with the usual spectral subclasses and $C_2$-, j-, MS- and temperature indices, and also with the new SiC- (SiC/C.A. abundance estimation) and $τ$- (opacity) indices. The values for the infrared indices were carried out through a Monte Carlo simulation of the radiative transfer in the circumstellar envelopes of the stars. The full set of indices, when applied to our sample, resulted in a more efficient system of classification, since an examination in a wide spectral range allows us to obtain a complete scenario for carbon stars.
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