探索银河系反中心$|Δ\ell|=20^\circ$内的FSR疏散星团候选者
Exploring FSR open cluster candidates within $|Δ\ell|=20^\circ$ of the Galactic anticentre
摘要：
我们调查的性质的样本星团候选人检测到的恒星超密度对银河系的anticenter。从Froebrich，Scholz，and Raftery（FSR）的星表中，该样本包含28个星团候选者，位于反中心的$|Δ\ell|=20^\circ$内。这些是FSR分类的该扇区中的所有候选者，具有很高的星团概率。我们的主要目标是确定这些候选人是未知的星团的分数，以获得他们的天体物理参数，并调查在银河系中的位置的集群参数的关系。当光度和径向分布特性被认为是在一起，一个重要部分的恒星超密度与波动水平$\ga3σ$被证明是星团。因此，候选星团的星表，加上目前的研究，是识别未知疏散星团的重要来源。这些努力影响了对恒星形成速率、星团动力学演化和银河系结构等的理解。
英文摘要：
We investigate the nature of a sample of star cluster candidates detected as stellar overdensities towards the Galactic anticentre. Taken from the catalogue of Froebrich, Scholz, and Raftery (FSR), the sample contains 28 star cluster candidates located within $|Δ\ell|=20^\circ$ of the anticentre. These are all the candidates in that sector classified by FSR with a high probability of being star clusters. Our main goals are to determine the fraction of such candidates that are unknown star clusters, to derive their astrophysical parameters, and to investigate the relationship of cluster parameters with position in the Galaxy. When photometric and radial distribution properties are considered together, an important fraction of the stellar overdensities with a fluctuation level $\ga3σ$ are shown to be star clusters. Thus, catalogues of star cluster candidates, coupled to the present kind of study, are an important source for identifying unknown open clusters. Such efforts affect the understanding of the star-formation rate, cluster dynamical evolution, and Galactic structure, among others.
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