Galactic Structure and Kinematics from Absolute Proper Motions

Klemola Hanson星系结构和绝对固有运动的运动学。对各类恒星运动的研究是了解银河系的基础。固有运动为研究太阳运动、星系旋转和速度色散以及恒星距离和光度的统计测定提供了观测基础。Lick北方固有运动（NPM）计划通过提供覆盖北方三分之二天空的绝对固有运动，满足了许多这些基本观测需求。经过40多年的努力，国家预防机制目前正在取得成果。第一个时代摄影开始于1947年；第二纪元摄影于1988年完成。对银河系外天空中正确运动、位置和光度的测量和缩减始于1975年，将于1992年结束。该奖项支持了几个期待已久的NPM绝对固有运动在银河系结构和运动学中突出问题的应用。其中包括对太阳运动和星系旋转的明确研究，对恒星数量和远离银面运动变化的强大探测，以及对RR Lyrae型恒星光度和运动的大规模新研究。该合同还将支持Lick NPM目录的出版，并推进NPM项目最后部分的工作。

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.