论文标题
凸起的不对称和动态进化（BAADE）调查中富含碳和氧气的渐近巨型分支（AGB）星星
Carbon- and Oxygen-rich Asymptotic Giant Branch (AGB) stars in the Bulge Asymmetries and Dynamical Evolution (BAaDE) survey
论文作者
论文摘要
从凸起的不对称和动力学演化（BAADE）调查中发现SIO MASERS的检测更加紧密地定义了富含氧气（O）渐近（O）渐近巨型分支（AGB）恒星的区域，位于多个红外（IR）颜色色图中。使用Baade调查中的MSX和2级数据以及无线电光谱，我们发现在Baade调查中观察到了三个主要人群：O-Rich AGB星星，其中约73美元\％$ $ $ host sio sio masers，富含碳含量的AGB星星，这些星星没有托管这些masers，以及一小部分可能的年轻的幼小的stellar对象（ysos）。 YSO和AGB恒星之间的区别只能使用MSX数据，特别是$ [d] - [e] $颜色，而由2MASS提供的较短波长对于分割潜在的c-和o-o-o-O-rich AGB恒星是必需的。与这些类似的部门在多个较早的IR研究中都可以看到，但是Baade当前提供了$ \ sim $ 15000来源的样本，这些来源远远超过了先前的样本量研究，因此提供了更加不同的分区。有了这些IR的区别，我们讨论了它们的分子检测或IR颜色中的例外，以及银河坐标中三个种群的分布。
Detections of SiO masers from the Bulge Asymmetries and Dynamical Evolution (BAaDE) survey more tightly define the region where Oxygen-rich (O) Asymptotic Giant Branch (AGB) stars reside in multiple infrared (IR) color-color diagrams. Using MSX and 2MASS data along with radio spectra from the BAaDE survey we find that three main populations were observed in the BAaDE survey: O-rich AGB stars of which about $73\%$ host SiO masers, Carbon-rich (C) AGB stars which do not host these masers, and a small contaminating set of possible Young Stellar Objects (YSOs). The distinction between YSOs and AGB stars can be drawn using only MSX data, specifically the $[D]-[E]$ color, while the shorter wavelengths provided by 2MASS are necessary to divide potential C- and O-rich AGB stars. Divisions similar to these have been seen in multiple earlier IR-studies, but BAaDE currently provides a sample of $\sim$ 15000 sources which far exceeds previous studies in sample size, and therefore provides much more distinct divisions. With these IR distinctions in place, we discuss the sources which are exceptions in either their molecular detections or IR colors, as well as the distribution of the three populations in Galactic coordinates.
