Collaborative Research: Completion of the Southern Proper Motion Program

AST 0098548 Van Altena在一个合作研究项目中，耶鲁大学南方天文台的William Van Altena博士和密歇根州立大学的Timothy Beers博士将使用阿根廷耶鲁南方天文台新安装的CCD摄像机，以完成耶鲁/圣胡安南方自然运动(SPM)计划。SPM的前两个目录已经展示了在这个项目中可以达到的绝对自行的高质量。该系统将完成对南方天空的第二纪元观测，此外，还将提供V和B的第一套完整的南方天空光度测量，其震级限制为V=18.0和B=19.0。虽然最初的两个SPM星表是基于用于运动学研究的感兴趣天体和随机选择的恒星的输入列表，但新的CCD摄像系统，以及最近由美国海军天文台精密测量机完成的所有SPM板块的数字化，将使新版SPM星表能够完整到1世纪板块的极限星等。这一努力带来的科学回报将是巨大的！在此授奖期间，应观察和分析约6000平方度，或剩余SPM场的四分之三。该项目的直接动机与探索银河系的运动学和动力学有关，不仅使用随机选择的匿名恒星，还使用特殊兴趣的子集；主要是最近完成的数万颗金属贫乏(MP)和野外水平分支/主序A型(FRB/A)候选恒星的名单，这些候选恒星是从比尔斯和他的同事的香港调查板块的数字扫描中获得的，以及从兰堡/ESO调查的恒星部分产生的更大一组感兴趣的目标。这两项调查构成了目前对早期星系的性质及其化学和动力学演化的光谱探索的基础，因此具有直接的意义。这一信息将与已有的径向速度结合在一起，或从计划的大规模光谱后续行动中获得，以便在利用空间飞行任务FAME和SIM获得自行和距离测量之前很久就从其他调查中确定最感兴趣的目标的完整空间运动。

AST 0098548Van AltenaIn a collaborative research project, Dr. William Van Altena, of Yale Southern Observatory, and Dr. Timothy Beers, of Michigan State University, will use the newly installed CCD cameras at the Yale Southern Observatory in Argentina in order to complete the Yale/San-Juan Southern Proper Motion (SPM) program. The first two catalogs of the SPM have already demonstrated the high quality of the absolute proper motions that are attainable within this program. The CCD system will allow completion of the 2nd-epoch observations of the southern sky and, furthermore, will provide the first full southern-sky set of photometry in V and B, down to a magnitude limit of V = 18.0 and B = 19.0. While the first two SPM Catalogs were based on input lists of interesting objects as well as randomly selected stars for kinematic studies, the new CCD camera system, and recent completion of the digitization of all SPM plates by the Precision Measuring Machine of the U.S. Naval Observatory, will allow the new version of the SPM Catalog to be complete to the limiting magnitude of the 1st-epoch plates. The science return from this effort will be enormous! During this award period, about 6000 square degrees, or three-quarters of the remaining SPM fields should be observed and analyzed.The immediate motivation for the project is linked to exploration of the kinematics and dynamics of the Galaxy, using not only randomly selected anonymous stars but also subsets of special interest; primarily the recently completed lists of tens of thousands of metal-poor (MP) and field horizontal- branch/main-sequence A-type (FRB/A) candidate stars obtained from digital scans of the HK survey plates of Beers and colleagues, and the even larger set of interesting targets generated from the stellar component of the Ramburg/ESO Survey. These two surveys form the basis for present spectroscopic exploration of the nature of the early Galaxy and its chemical and dynamical evolution, and hence are of immediate interest. This information will be combined with radial velocities already in hand, or to be obtained from planned large-scale spectroscopic follow-up, in order to determine full space motions for the most interesting targets from the other surveys long before proper motions and distance measurements are obtained with the space missions FAME and SIM.***