Collaborative Project: Distances and Ages from Detached Eclipsing Binary Stars

paczynski, Bohdan“合作项目：离体食双星的距离和年龄”AST-9819786这是与华盛顿卡内基研究所的Ian Thompson对新发现的食双星进行的多方向合作研究（AST-9819786）。目标是为在光学引力透镜实验（OGLE）过程中发现的球状星团和麦哲伦星云中的恒星提供距离测定、组成和年龄。将进行广泛的观测工作，以获得OGLE双星的光度和光谱观测，由此可以使用标准技术确定距离、质量和半径。这些对空前数量的双星进行的测量，将为恒星演化理论提供可靠的测试，进一步限制球状星团的年龄，从而提高银河系和整个宇宙的最小年龄估计。

ABSTRACTPaczynski, Bohdan"Collaborative Project: Distances and Ages from Detached Eclipsing Binary Stars"AST-9819787This is a multi-pronged collaborative investigation of newly discovered eclipsing binary stars with Ian Thompson at Carnegie Institute of Washington (AST-9819786). The goal is to provide distance determinations, compositions and ages for stars in globular clusters and the Magellanic Clouds found during the course of the Optical Gravitational Lensing Experiment (OGLE). An extensive observational effort will be undertaken to obtain photometric and spectroscopic observations of OGLE binaries from which distances, masses and radii can be determined using standard techniques. These measurements, made for an unprecedented large number of binaries, will provide firm tests of stellar evolution theory, further constrain globular cluster ages, and thus contribute improved minimum age estimates for the Galaxy and Universe at large.