Collaborative Research: The Assembly History of the Andromeda Spiral Galaxy

合作研究：仙女座螺旋星系的组装史

• 批准号: 0607852
• 负责人: Puragra Guha Thakurta
• 金额: --
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607852&HistoricalAwards=false
• 关键词: Collaborative; Research; Assembly; History; Andromeda

AST-0607852GuhathakurtaAST-0607630JohnstonAST-0607726MajewskiAST-0607377BullockThis collaborative project across four institutions has at its heart the first large-scale spectroscopic survey of the halo of M31, the Andromeda Galaxy. Imaging surveys appear to have discovered large streamers as well as an overall smooth population, and this study aims to understand the nature and origin of this halo and its structure. The combination of observational facilities and techniques to be used should be much more efficient than prior studies, and the anticipated sample will contain thirty times as many radial velocity measurements as previously made in the halo of M31. This study not only will derive a mean metallicity distribution function, outer rotation curve, and velocity dispersion for the M31 halo, but more importantly it will assess the extent to which the disruption of satellite galaxies has contributed to the halo population. The expected discrete streams of material in radial velocity and abundance will provide a visual record of the accretion history of the M31 halo.Women and other under-represented groups will participate at the undergraduate and research level at all four of the collaborating institutions. Each member of the research team gives regular public lectures and presentations in K-12 classrooms. As our nearest large spiral galaxy, M31 is well known to the public, so it is likely that research results can be made readily accessible to non-scientists.

AST-0607852GuhathakurtaAST-0607630JohnstonAST-0607726MajewskiAST-0607377Bullock 这个跨越四个机构的合作项目的核心是对仙女座星系 M31 光环进行首次大规模光谱调查。 成像调查似乎发现了大型飘带以及整体平滑的种群，这项研究旨在了解该光环的性质和起源及其结构。 所使用的观测设施和技术的组合应该比之前的研究更有效，并且预期的样本将包含先前在 M31 光环中进行的径向速度测量的三十倍。 这项研究不仅将得出M31晕的平均金属丰度分布函数、外自转曲线和速度色散，更重要的是，它将评估卫星星系的破坏对晕种群的影响程度。 预期的径向速度和丰度离散物质流将提供 M31 光环吸积历史的视觉记录。女性和其他代表性不足的群体将参与所有四个合作机构的本科生和研究水平。 研究团队的每位成员定期在 K-12 教室进行公开讲座和演示。 作为距离我们最近的大型螺旋星系，M31 为公众所熟知，因此非科学家很可能可以轻松获得研究结果。