The Allegheny Observatory Astrometric Program

AST 9530769 阿勒格尼天文台天体测量计划。 阿勒格尼天文台的天体测量计划利用独特的仪器，以确定非常高的精度，天体物理学上有趣的对象在250秒差距的太阳质量。 结合多通道天体测量光度计（MAP）和解冻折射镜的新光学系统，天体测量程序具有足够的精度，以获得可靠的三角距离的几个开放的星星集群，以及其他光度标准的大部分地区的HR图。 结合70年基线照相底片收集的数据，MAP/Thaw系统具有足够的精度来描绘先前三角技术领域之外的质量-光度关系的部分，并在我们对年龄和化学成分对恒星能量输出的影响的理解方面取得重大进展。 ====================================

AST 9530769 The Allegheny Observatory Astrometric Program. The Allegheny Observatory astrometric program utilizes unique instrumentation to determine very high precision parallaxes and masses of astrophysically interesting objects within 250 parsecs of the Sun. Combining the Multichannel Astrometric Photometer (MAP) and the new optical system of the Thaw refractor, the astrometric program has sufficient precision to obtain reliable trigonometric distances of several open star clusters as well as other luminosity standards in most parts of the HR diagram. Combined with data from a 70 year baseline photographic plate collection, the MAP/Thaw system has sufficient precision to delineate portions of the mass-luminosity relationship previously outside of the domain of trigonometric techniques, and to make signfiicant improvements in our understanding of the effects of age and chemical composition on the energy output of stars. ====================================