The Four-Dimensional Galaxy

介绍：Case Western Reserve University：Heather Morrison TITLE：The Four-DimensionGalaxyAbstrraCTDR.凯斯西储大学的希瑟·莫里森将利用几项观测，主要是斯隆星系理解和探索扩展(SEGUE)K巨星观测“和意大利K巨星观测”，从5-100千帕秒的银心半径追踪银晕。SEGUE调查将产生一个10,000颗K巨星的样本，比之前的任何样本都大两个数量级。意大利面团的调查和太阳附近贫金属星的新样本将产生K巨星在位置/速度空间的所有6个分量的数据。所有这些恒星都可以获得精确的距离、速度和金属度，从而制作出一张银河系的四维地图，利用光晕中的星流和外盘的结构来限制银河系的吸积历史。莫里森将进行一项校准工作，这是SEGUE K巨星调查所需的，但对于希望信心十足地使用斯隆数据库的未来恒星研究人员来说，这将是有用的。莫里森表示，她致力于向公众和她所在机构的学生伸出援手。这项研究项目将为本科生研究和互动课堂讨论提供机会。最后，由莫里森博士与人共同创立的女性科学与工程案例项目，旨在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.