Collaborative Research: The Star Formation History of the Milky Way - Integrating Color-Magnitude Diagram and New Chemical Abundance Information

ST0307393PI：Jon Holtzman INSTITUTION：新墨西哥州立大学霍尔兹曼博士在这个与德克萨斯大学埃尔帕索分校的Verne Smith博士(AST-0307532)合作的项目中，将开展一个多方面的项目，将导致对银河系恒星形成的更好理解。他们的方法将结合两种广泛使用的技术，以加强人们可以从其中任何一种单独应用中得出的结论。他们将通过为依巴谷星表中有限体积的演化恒星样本创建一个高分辨率光谱观测的同质数据库以及由此得出的丰度，并将这些丰度信息与颜色-星等图结合起来，研究太阳附近的恒星形成历史。然后，他们将建立星系化学演化的模型，这些模型既受恒星形成历史的限制，也受详细的丰度剖面的限制。他们还计划通过一种类似的技术，将恒星金属丰度信息与颜色-星等图结合起来，研究银河系隆起的恒星形成历史。他们将向社区提供其样本的观测和丰度数据库。他们还与所在机构的本科生和研究生密切合作。***

AST 0307393PI: Jon HoltzmanINSTITUTION: New Mexico State University Dr. Holtzman, in this collaborative project with Dr. Verne Smith of University of Texas, El Paso (AST-0307532), will carry out a multi-faceted project that will lead to improved understanding of the star formation of the Milky Way Galaxy. Their approach will combine two widely used techniques to strengthen the conclusions that one could draw from the application of either separately. They will investigate the star formation history of the solar neighborhood by creating a homogeneous database of high-resolution spectroscopic observations, and the abundances derived from it, for a volume-limited sample of evolved stars in the Hipparcos catalog, and combine this abundance information with the color-magnitude diagram. They will then develop models of galactic chemical evolution which are constrained by both this star formation history and the detailed abundance profiles. They also plan to investigate the star formation history of the Galactic bulge by a similar technique of combining information on stellar metallicity with color-magnitude diagrams. They will make available to the community the database of both observations and abundances for their sample. They also work closely with both undergraduate and graduate students at their institutions. ***