Eclipsing Binary Stars in Globular Clusters

球状星团中食双星

• 批准号: 9528367
• 负责人: Mario Mateo
• 金额: $ 20.15万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528367&HistoricalAwards=false
• 关键词: Eclipsing; Binary; Stars; Globular; Clusters

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. ***

95-28367 Mateo，Mario 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）测量大范围集群环境中的二进制频率，以确定它如何随年龄，集群浓度和金属丰度而变化。 (2)研究一些星团中蓝离散星之间食双星的频率，以区分蓝离散星的碰撞起源与合并起源。 (3)导出绝对聚类距离，无需中间步骤。 (4)从两个分量的径向速度曲线获得Pop II星的质量，以测试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测光调查，旨在寻找周期小于5-10天的食双星。 后续的光谱观测将在4米级望远镜上进行。 ***