Allegheny Observatory Astrometric Program

乔治盖特伍德博士在阿勒格尼天文台的长期天体测量计划的目标是为天体物理学上感兴趣的恒星群提供高精度的天体测量数据，这些恒星不能或不会被其他技术研究。 这些恒星包括对CCD观测系统和FAME航天器来说太亮的恒星，以及运动太慢而无法被短期（5年）天体测量计划探测到的恒星。 对恒星系统形成和演化的理论理解有时需要几十年的数据库。 因为它们是最好的研究对象，明亮的恒星通常是可以研究的最有信息量的例子。 相对于行星系统而言，对三重和四重星星系统的研究提供了恒星和棕矮星形成和演化过程的指示。 对显然是单颗恒星的长期运动的探测，给了我们第一个类似于太阳系的行星系统的迹象。 ***

The objective of Dr. George Gatewood's long term astrometric program at Allegheny Observatory is to provide high precision astrometric data for groups of astrophysically interesting stars that either can not or will not be studied by other techniques. These include stars that are too bright for CCD observing systems and for the FAME spacecraft, as well as stars for which the motion is too slow for detection by short term (5years) astrometric programs. Theoretical understanding of the formation and evolution of stellar systems sometimes requires a data base extending over decades. Because they are the best studied, the bright stars are often the most informative examples that can be studied. The study of triple and quadruple star systems yield indications of the formation and evolution processes of stars and brown dwarfs, as opposed to that of planetary systems. Detections of the long term motions of apparently single stars are giving us the first indications of planetary systems that are similar to the Solar System. ***