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

了解银河系目前螺旋结构的形成和演化必须从观测开始。然而，银河系的结构并不容易解释，因为在许多研究中有多种示踪物体的选择和不同的观测方法。对遥远恒星结构进行空间分离是一项复杂的实验，观测数据的数量、质量和完整性及其可靠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）将采用精确的光度法，利用uvby-Beta光度法对两种类型的示光物体，OB协会和星团以及a - f - g明亮巨星/超巨星进行光度测定，并使用完全均匀的样品和仔细考虑校准，这将大大提高对银河系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，以及在很远的距离上追踪银河系的特征。虽然这项研究对天文学领域有潜在的广泛贡献，但该计划本身也可以由主要的本科院校的教师和学生执行，工作将在那里进行。该计划中的个别项目被设计成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。主要目标是为学生提供积极的学习经验，并介绍科学调查的过程。此外，特殊的Stromgren-HBeta滤光器（将作为该项目的一部分获得）也将提供给天文学界。

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.