A Star Catalog for the Open Cluster NGC 188
A Star Catalog for the Open Cluster NGC 188
复制标题
疏散星团 NGC 188 的星表
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. VandenBerg
中科院分区：
文献类型：
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作者：
P. Stetson;R. Mcclure;D. VandenBerg
我们提出了新的BVRI宽带测光的老疏散星团NGC 188，分析的299 CCD图像的基础上，无论是由我们获得的，捐赠的同事，或从公共档案检索。我们比较我们的结果的星星星星的基础上，从11个以前的光度数据集的集群。我们将所有光度研究的数据进行同质化和合并，并将之前四次集群场自行研究的成员概率合并。Landolt（，AJ，104，340）的BV（约翰逊）RI（双折射）光度系统中的基准星系团序列代表了本文的主要结果。这些样本被用来与参考样本进行比较，参考样本包括：（1）兰道尔特标准星，（2）旧的疏散星团M67和NGC 6791，以及（3）在25 pc以内具有现代测光和精确依巴谷星群的恒星。在一个配套文件中，我们表明，我们得出的集群结果与现代恒星内部和演化理论的预测吻合得很好，给出合理的估计集群化学丰度和前景红化。NGC 188的单独和合并数据集已通过我们的网站提供。
We present new BVRI broadband photometry for the old open cluster NGC 188, based on an analysis of 299 CCD images either obtained by us, donated by colleagues, or retrieved from public archives. We compare our results on a star‐by‐star basis with data from 11 previous photometric data sets for the cluster. We homogenize and merge the data from all the photometric studies, and also merge membership probabilities from four previous proper‐motion studies of the cluster field. Fiducial cluster sequences in the BV (Johnson) RI (Cousins) photometric system of Landolt (, AJ, 104, 340) represent the principal result of this paper. These are compared to reference samples defined by (1) Landolt’s standard stars, (2) the old open clusters M67 and NGC 6791, and (3) stars within 25 pc having modern photometry and precise Hipparcos parallaxes. In a companion paper, we show that our derived cluster results agree well with the predictions of modern stellar interior and evolution theory, given reasonable estimates of the cluster chemical abundances and foreground reddening. The individual and combined data sets for NGC 188 have been made available through our Web site.