Ages and Distances of Globular Clusters from Observations of Detached Eclipsing Binary Stars

华盛顿卡内基研究所：Ian Thompson TITLE：来自分离的食双星观测的球状星团的年龄和距离。华盛顿卡内基研究所的伊恩·汤普森将开展一个项目，利用对分离的、日食的、双线双星的光谱和光度观测来测量银河系球状星团的年龄和距离。该计划将利用对这些双星的埃谢尔光谱观测来确定这些组件的质量，然后通过关闭质量-年龄关系，将有可能得出恒星所在星团的年龄，而与它们的距离无关。将使用表面亮度-颜色关系来推导簇距离。该项目的观测设施位于智利，还与波兰华沙哥白尼天文中心的天文学家开展了强有力的国际合作。

AST-0507325INSTITUTION: Carnegie Institution of WashingtonPI: Ian ThompsonTITLE: Ages and Distances of Globular Clusters from Observations of Detached Eclipsing Binary Stars ABSTRACTDr. Ian Thompson, of the Carnegie Institution of Washington, will undertake a program to measure ages and distances of Galactic globular clusters using spectroscopic and photometric observations of detached, eclipsing, double-lined binary stars. The program will utilize Echelle spectroscopic observations of these binaries to determine the masses of the components, and with turn-off mass-age relations it will then be possible to derive ages for the clusters in which the stars reside, independently of their distances. The cluster distances will be derived using surface brightness-color relations. The program, with observational facilities located in Chile, also has a strong international collaboration with astronomers from the Copernicus Astronomical Center in Warsaw, Poland.