RUI: Galacitc Spiral Structure Reassessment: a precision photometry approach to complete homogeneous samples

了解银河系的形成和演化“S现在的螺旋结构必须从观测开始。然而，由于许多研究中使用了多种示踪对象和不同的观测方法，因此银河系结构并不容易解释。在空间上分离遥远的恒星结构是一项复杂的实验，其中观测数据的数量、质量、完整性及其可靠的解释起着至关重要的作用。在这种情况下，Kaltcheva博士(威斯康星大学奥什科什分校)将采用精密光度学方法，利用两种类型的示踪天体，OB协会和星团以及A-F-G明亮巨星/超巨星的Uvby-Beta光度学，以及完整的均匀样本和仔细考虑的校准，这将大大改进对银河螺旋结构某些方面的确定，特别是关于沿旋臂的恒星形成过程和远距离追踪银河系特征。虽然这项研究对天文学领域有潜在的广泛贡献，但该计划本身也适用于主要由本科生机构的教职员工和学生执行，这项工作将在那里进行。该计划中的个别项目被设计为可以将小部分分离为独立的研究任务，这些任务可以由不同技能水平的学生在合理的时间内完成。一个主要的目标是为学生提供积极的学习体验和对科学调查过程的介绍。此外，还将向天文学界提供斯特龙格伦-HBeta特殊滤光器(作为该项目的一部分)。

Understanding the formation and evolution of the Milky Way''s present spiral structure must necessarily begin with observations. However, the Galactic structure is not easy to interpret because of the multiple choices of tracer objects and varied observational approaches used in many studies. To spatially separate distant stellar structures is a complex experiment in which the quantity, quality, and completeness of the observational data and their reliable interpretation play a critical role. In this context, Dr. Kaltcheva (University of Wisconsin-Oshkosh) will employ a precision photometry approach, utilizing uvby-Beta photometry of two types of tracer objects, OB associations and clusters and A-F-G bright giants/supergiants, with complete homogeneous samples and careful consideration to calibration that will result in a greatly improved determination of some aspects of the Galactic spiral structure, particularly regarding the star formation processes along the spiral arms and tracing the Galactic features to large distances.While this research has a potential broad contribution to the field of astronomy, the program itself is also feasible for execution by faculty and students in a primarily undergraduate institution, where the work will take place. The individual projects in the program are designed such that small parts can be isolated as independent research tasks, which can be accomplished by students of varying skill levels in reasonable amounts of time. A primary goal is to provide students with a positive learning experience and an introduction to the process of scientific investigation. In addition, the special Stromgren-HBeta filters (to be acquired as part of this project) will also be made available to the astronomical community.