Collaborative Research: Structure and Evolution of M31's Stellar Halo from a Large-Scale Spectroscopic Survey

合作研究：大规模光谱巡天中 M31 恒星晕的结构和演化

• 批准号: 0307966
• 负责人: Puragra Guha Thakurta
• 金额: $ 11.66万
• 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: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307966&HistoricalAwards=false
• 关键词: Collaborative; Research; Structure; Evolution; M31

PROPOSAL NO: AST-0307966PI: Puragra GuhathakurtaINSTITUTION: University of California, Santa Cruz================================================================This collaborative project is led by Puragra Guhathakurta of UCSC (AST-0307966), and includes Michael Rich of UCLA (AST-0307931), Steven Majewski of University of Virginia (AST-0307842) and Kathryn Johnston of Wesleyan University (AST-0307846).This team of collaborators will improve our understanding of the nature and origin of the halo of M31 by carrying out a large-scale spectroscopic survey that will yield both stellar radial velocities and metallicities. The larger sample will allow them to explore the halo/outer disk stellar population over a wide range of galactocentric distances by determining the mean metallicity distribution function, the outer rotation curve, and the velocity dispersion of the halo. Their study will focus on results for stars in the discrete streams of material in the halo that have been discovered recently from wide field imaging surveys. Ultimately, their sample should allow them to assess the extent to which the disruption of satellite galaxies accreted by M31 has contributed to the formation of the halo population. All of the collaborators involve undergraduate and graduate students in their research efforts. They expect to give public lectures and to speak in K-12 classrooms about their research and to make the results of their work accessible to the public. They also plan to purchase a narrow band filter for work on the Ca infrared triplet, which will be made available to all users of the Keck telescopes.

提案编号：AST-03079666PI：Puragra Guhathakurtainstitution：加利福尼亚大学圣克鲁斯分校============================================================== ================================该合作项目由UCSC的Puragra Guhathakurta（AST-0307966）领导，其中包括Michael Rich加州大学洛杉矶分校（AST-0307931），弗吉尼亚大学的史蒂芬·马耶夫斯基（AST-0307842）和卫斯理大学的凯瑟琳·约翰斯顿（AST-0307846）。这将改善我们对M31的自然和起源的合作者，进行大规模的光谱调查，将产生恒星的径向速度和金属性。 较大的样本将使他们能够通过确定平均金属分布函数，外旋曲线和光环的速度分散，从而在广泛的半乳酸距离上探索光环/外磁盘恒星群体。 他们的研究将重点关注恒星在光环中的离散材料流中的结果，这些结果最近是从广域成像调查中发现的。 最终，他们的样本应允许他们评估M31积累的卫星星系破坏的程度，这有助于晕Halo人群的形成。 所有合作者都涉及本科生和研究生的研究工作。 他们希望在K-12教室里进行公开讲座，并在K-12教室里谈论他们的研究，并使他们的工作结果可供公众获得。 他们还计划购买一个狭窄的频带过滤器，以在CA红外三重态上进行工作，该工程将为凯克望远镜的所有用户提供。