Galactic Structure and Kinematics from Absolute Proper Motions

来自绝对自行的Klemola Hanson星系结构和运动学。研究各类恒星的运动是理解我们银河系的基础。自行为研究太阳运动、银河系自转和速度色散以及统计确定恒星距离和光度提供了观测基础。利克北方自然运动(NPM)计划通过提供覆盖北部三分之二天空的绝对自然运动，满足了许多基本的观测需求。经过40多年的努力，国家防范机制现已初见成效。第一纪元摄影始于1947年，第二纪元摄影于1988年完成。对银河系外天空中自行、位置和光度的测量和减少始于1975年，将于1992年进行竞争。这一奖项支持了几个期待已久的NPM绝对自行应用，以解决星系结构和运动学中的突出问题。其中包括对太阳运动和银河系自转的明确研究，对远离银河系平面的恒星数量和运动学变化的强大探测器，以及对天琴座RR型恒星光度和运动学的大规模新研究。该奖项还将支持Lick NPM目录的出版和NPM计划最后部分的推进工作。

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.