Eclipsing Binary Stars in Globular Clusters

95-28367马特奥，马里奥马特奥博士将系统地搜索和研究球状星团中的食双星。该项目有四个目标：(1)在广泛的星团环境中测量二进制频率，以确定它如何随年龄、星团浓度和金属丰度而变化。(2)研究蓝离散星在多个星团中的食双星频率，以区分蓝离散星的碰撞起源和合并起源。(3)推导出不需要中间步骤的绝对聚类距离。(4)通过两组分的径向速度曲线获得Pop II恒星的质量，检验球状星团的绝对年龄尺度。这些研究的数据将基于对球状星团的大规模光度调查，该调查旨在寻找周期小于5-10天的日食双星。后续的光谱观测将在4米级望远镜上进行。＊＊＊

95-28367 Mateo, Mario Dr. Mateo will systematically search for and study eclipsing binaries in globular clusters. There are four goals of the project: (1) Measure the binary frequency in a wide range of cluster environments to determine how it varies with age, cluster concentration and metallicity. (2) Study the frequency of eclipsing binaries among blue stragglers in a number of clusters to distinguish between collisional vs. merger origin for blue stragglers. (3) Derive absolute cluster distances without intermediate steps. (4) Obtain masses of Pop II stars from radial velocity curves of both components to test the absolute age scale for globular clusters. The data for these studies will be based on a large scale photometric survey of globular clusters designed to search for eclipsing binaries with periods of less than 5-10 days. Follow up spectroscopic observations will be made on 4-m class telescopes. ***