Galactic Structure and Kinematics from Absolute Proper Motions

克莱莫拉 汉森 从绝对自行看银河系的结构和动能。 对各类恒星运动的研究是基本的 对我们银河系的了解 适当的运动提供了 研究太阳运动的观测基础 旋转和速度分散，以及统计 恒星距离和光度的测定。 的利克 北方自行（NPM）计划满足许多这些基本的 通过提供绝对自行满足观测需要， 天空的北方三分之二。 国家预防机制正在取得成果 经过40多年的努力。 第一个时代的摄影开始了 1947年;第二纪元摄影于1988年完成。 自行、位置和姿态的测量和归算 银河系外天空的测光始于1975年， 1992年参加比赛。 该奖项支持国家预防机制的几个期待已久的应用程序 银河系中的绝对自行问题 结构和运动学。 其中包括一项权威性研究， 太阳运动和银河系旋转，一个强大的探测器， 远离银道面的恒星数量和运动学 一项关于天琴座RR型星星光度的大规模新研究， 运动学 该奖项还将支持《舔》的出版 NPM目录和推进NPM计划最后部分的工作。

Klemola Hanson Galactic Structure and Kinematics from Absolute Proper Motions. The study of the motions of various classes of stars is fundamental to an understanding of our Galaxy. Proper motions provide the observational basis for the study of solar motions, galactic rotation, and velocity dispersions, and for the statistical determination of stellar distances and luminosities. The Lick Northern Proper Motion (NPM) program meets many of these basic observational needs by providing absolute proper motions covering the northern two thirds of the sky. The NPM is now bearing fruit after more than 40 years of work. First epoch photography began in 1947; second epoch photography was completed in 1988. Measurements and reductions for proper motions, positions, and photometry in the sky outside the Milky Way began in 1975 and will be competed in 1992. This award supports several long awaited applications of the NPM absolute proper motions to outstanding problems in galactic structure and kinematics. These include a definitive study of solar motion and galactic rotation, a powerful probe of changing stellar populations and kinematics away from the galactic plane, and a massive new study of RR Lyrae type star luminosities and kinematics. This award will also support publication of the Lick NPM Catalog and advance work on the final part of the NPM program.