The Four-Dimensional Galaxy

单位：凯斯西储大学类型：Heather morrison标题：四维星系凯斯西储大学的Heather Morrison将使用几项调查，主要是斯隆银河理解和探索扩展（SEGUE） K巨星调查和意大利面K巨星调查，从5-100千秒差距的星系中心半径追踪银河系晕。SEGUE的调查将产生10,000个K巨星的样本，比以往任何样本都要大两个数量级。意大利面调查和太阳附近金属贫乏恒星的新样本将产生K巨星在位置/速度空间的所有6个组成部分的数据。所有这些恒星的精确距离、速度和金属丰度都将可用，从而绘制出一张银河系的四维地图，利用光晕中的恒星流和外盘的结构，该地图将用于约束银河系的吸积历史。Morrison将承担SEGUE K巨型调查所需的校准工作，但这将对未来希望自信地使用斯隆数据库的恒星研究人员有用。莫里森博士致力于向公众和她所在学校的学生伸出援手。这个研究项目将为本科生提供研究和互动课堂讨论的机会。最后，由莫里森博士共同创立的“科学与工程领域女性案例项目”（Case program for Women in Science and Engineering）致力于鼓励女性本科生留在科学领域。

AST-0607518INSTITUTION: Case Western Reserve UniversityPI: Heather MorrisonTITLE: The Four-Dimensional GalaxyABSTRACTDr. Heather Morrison, at Case Western Reserve University, will use several surveys, primarily the Sloan Extension for Galactic Understanding and Exploration (SEGUE) K giant star survey" and the Spaghetti K giant survey", to trace the Galactic halo from galactocentric radii of 5-100 kiloparsecs. The SEGUE survey will produce a sample of 10,000 K giants two orders of magnitude larger than any previous sample. The Spaghetti survey and a new sample of metal-poor stars in the solar neighborhood will result in data for K giants in all 6 components of position/velocity space. Accurate distances, velocities and metallicities will be available for all these stars, making a four-dimensional map of the Milky Way that will be used to constrain the accretion history of the Galaxy, using both star streams in the halo and the structure of the outer disk.Dr. Morrison will undertake a calibration effort that is needed for the SEGUE K giant survey, but one that will be of use to future stellar researchers who wish to use the Sloan database with confidence. Dr. Morrison displays a commitment to outreach to the public and to students at her home institution. This research project will provide opportunities for undergraduate research and interactive classroom discussion. Finally, the Case program for Women in Science and Engineering, co-founded by Dr. Morrison, is involved in encouraging women undergraduates to stay in science.