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来确定太阳250秒范围内非常高精度的视差和天体物理学感兴趣的天体质量。结合多通道天体测量光度计(MAP)和新的解冻折射光学系统，天体测量程序具有足够的精度，可以获得几个疏散星团的可靠三角距离以及HR图大部分部分的其他光度标准。结合70年基线照相底片收集的数据，MAP/SAW系统有足够的精度来描绘以前不属于三角技术领域的质量-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有显著的改进。=

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. ====================================