Rotating Rates of Late-Type Stars in Open Clusters 300Myr-1Gyr Old

9986962巴恩斯博士将对附近的星团进行广泛的调查，其目标是确定自转速率对恒星质量和年龄的依赖性。 太阳系恒星的自转周期将在精心挑选的星团中确定，年龄从3亿年到10亿年不等，使用测光观测，精度优于1%。 观测结果将与恒星旋转演化模型进行比较，不仅在年龄和质量方面，而且在恒星与其星周盘之间的相互作用程度等其他性质方面。 这个项目可能会提供新的见解磁盘锁定之间的作用慢，快旋转区，固体与差分旋转的发病率，和磁饱和。 这些问题直接有助于我们理解太阳自转和活动水平之间的相互作用。该项目的资金由NSF恒星天文天体物理学计划（AST/SAA）提供。

9986962 Dr. Barnes will undertake an extensive survey of nearby stellar clusters whose goal is to determine the dependence of rotation rate on stellar mass and age. The rotation periods will be determined for solar-type stars in carefully selected clusters with ages ranging from 300 million years to 1 billion years using photometric observations with a precision of better than one percent. The observational results will be compared to models for the rotational evolution of stars, not only with respect to age and mass, but also to other properties such as the degree of interaction between stars and their circumstellar disks. This project is likely to provide new insight into the role of magnetic disk locking between slow and fast rotation zones, the incidence of solid versus differential rotation, and magnetic saturation. These issues directly contribute to our understanding of the interplay between the Sun's rotation and activity level. Funding for this project is provided by the NSF program for Stellar Astronomy & Astrophysics (AST/SAA).