Membership, Rotation, Activity, and Lithium Abundances in a Selection of Nearby Clusters

选定的附近簇中的成员资格、轮换、活性和锂丰度

• 批准号: 0307585
• 负责人: Burton Jones
• 金额: $ 5.04万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-15 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307585&HistoricalAwards=false
• 关键词: Membership; Rotation; Activity; Lithium; Abundances

AST 0307585Jones, Burton F.This project will expand our knowledge of how stars like the Sun evolve by obtaining membership information for stars in nearby star clusters. Observations of star clusters have long provided the best link to theories of stellar structure and evolution. Stellar models of a given mass, composition, and age predict luminosity and effective temperature (color). Under the reasonable assumption that all stars in a cluster are the same age and chemical composition, cluster color versus magnitude diagrams provide templates against which the luminosity and effective temperature of stellar models can be compared. Lick Observatory has a collection of first epoch glass plate negatives of open star clusters taken around 1970 with the 36 inch refractor. Over the last three years second epoch plates of 11 nearby clusters were taken. The second epoch photography of these clusters, and 4 more clusters, is being completed. Suitable plate measurements are then used to determine proper motions for stars in the clusters and thence membership probability estimates for individual stars. Spectroscopic observations will be obtained of member stars in several of the clusters for the determination of abundances, stellar activity, and rotation. This database will be used by the PI and others toward a better understanding of the evolution of stellar activity, lithium abundance, and rotation in solar type stars different ages and metallicities. Broader Impacts. This research will produce a database with importance for studies of the mass and luminosity functions and the dynamical evolution of open star clusters, and will also be of use to spectroscopic observers who want to observe cluster members at high dispersion. This database will be made freely available. This grant supports collaboration with astronomers in Germany and at the Space Telescope Science Institute.

AST 0307585 Jones，Burton F.该项目将通过获取附近星星群中恒星的成员信息来扩展我们对太阳等恒星如何演化的知识。长期以来，对星星团的观测为恒星结构和演化理论提供了最好的联系。给定质量、成分和年龄的恒星模型可以预测光度和有效温度（颜色）。在合理的假设下，一个星团中的所有恒星都是相同的年龄和化学成分，星团颜色与星等图提供了恒星模型的光度和有效温度可以比较的模板。利克天文台收集了1970年左右用36英寸折射望远镜拍摄的第一代疏散星星团的玻璃底片。 在过去的三年里，拍摄了11个邻近星系团的第二纪元片。这些星团和另外4个星团的第二个纪元摄影正在完成。合适的板块测量，然后用于确定自行恒星的集群，从而成员概率估计个别恒星。将获得几个星团中成员星的光谱观测结果，以确定丰度、恒星活动和旋转。 这个数据库将被PI和其他人用来更好地了解恒星活动的演变，锂丰度，以及不同年龄和金属丰度的太阳型恒星的旋转。更广泛的影响。这项研究将产生一个数据库的质量和光度函数的研究和开放的星星集群的动力学演化的重要性，也将使用光谱观测者谁想要观察集群成员在高色散。该数据库将免费提供。 这笔赠款支持与德国和太空望远镜科学研究所的天文学家合作。