Halo Stars: Stellar Rotation, Planets ?, and Ages

AST 0307340 PI：约翰·莱尔德机构：保龄球绿色州立大学博士。约翰·莱尔德将与查佩尔山的布鲁斯·卡尼合作，开展一系列旨在更好地了解银河系恒星群的项目。 他们将在四个广泛的领域开展研究活动：1）跟踪他们最近的观测结果，这些观测结果表明，旋转的红色水平分支和红巨星分支恒星的比例惊人地高，这可能与行星吸积有关，2）探索双星的质量-光度关系，以限制恒星氦丰度，3）研究贫金属亚巨星，以细化金属丰度和确定年龄，4）研究局部G矮星，以调查太阳附近薄盘和厚盘种群的化学和动力学演化，以及它们的完整金属丰度分布函数，后续研究将提供元素与铁的比例作为[Fe/H]的函数的详细信息。本科生和研究生将参与这项研究。 研究活动和结果将通过在职物理科学教师的硕士课程整合到K-16科学教育中，该课程强调建模基于研究的教学策略，并明确包括天文学组成部分和西北俄亥俄州7-12名教育工作者，学院，社区和商业合作伙伴的合作，以加强招聘，准备和支持7-12名数学和科学教师。***

AST 0307340PI: John LairdINSTITUTION: Bowling Green State UniversityDr. John Laird, in collaboration with Bruce Carney of UNC, Chapel Hill, will carry out a suite of projects that are aimed at developing a better understanding of the stellar populations in our galaxy. They will pursue research activities in four broad areas: 1) following up on their recent observations that suggest that the surprisingly high fraction of field red horizontal branch and red giant branch stars that rotate may be linked to planet accretion, 2) the exploration of the mass-luminosity relationship for binary stars to constrain the stellar helium abundance, 3) a study of metal-poor subgiant stars to refine metallicities and determine ages, and 4) a study of local G dwarfs to investigate the chemical and dynamical evolution of the thin and thick disk populations in the solar neighborhood, and their full metallicity distribution functions, from which follow-up studies will provide details on the element-to-iron ratios as a function of [Fe/H].Undergraduate and graduate students will be involved in the research. The research activities and results will be integrated into K-16 science education through a masters program for in-service physical science teachers that emphasizes modeling research-based teaching strategies, and explicitly includes an astronomy component and a collaboration in northwest Ohio of 7-12 educators, colleges, and community and business partners to enhance recruiting, preparation, and support of 7-12 math and science teachers. ***