Collaborative Research: Searching for Ultra-Faint Galaxies Around the Milky Way

合作研究：寻找银河系周围的超微弱星系

• 批准号: 0908193
• 负责人: Beth Willman
• 金额: $ 34.64万
• 依托单位: Haverford College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0908193&HistoricalAwards=false
• 关键词: Collaborative; Research; Searching; Ultra; Faint

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Dr. Willman, Dr Geha and their team will apply their well-tested algorithms to search for nearby ultra-faint dwarf galaxies in vast regions around the Milky Way. They will use new datasets from large surveys, including the Sloan Digital Sky Survey, the Red Sequence Cluster Survey and the Southern Sky Survey. Data are already available from all these except the Southern Sky Survey, which should begin in 2009. The team will improve their algorithms to search for faint dwarf galaxies in new regions of parameter space in size, age and distance. Follow-up observations including both deeper photometry and spectroscopy will measure the mass, metallicity and other fundamental properties of new candidate dwarfs. The work will yield a sample of ultra-faint dwarfs with a broad range of intrinsic properties, in a statistically significant volume around the Milky Way.A postdoctoral researcher and both graduate and undergraduate students will be trained as they participate in this research. Dr. Willman and Dr. Geha will develop and disseminate curricular resources based on this research for classes in Galactic Astronomy at the advanced undergraduate level. The postdoctoral researcher will have the opportunity for a closely mentored undergraduate teaching experience at Haverford College. The team will create a wiki to compile and maintain information on Local Group dwarf galaxies.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。Willman博士，Geha博士和他们的团队将应用他们久经考验的算法在银河系周围的广阔区域寻找附近的超微弱矮星系。 他们将使用来自大型调查的新数据集，包括斯隆数字巡天，红色序列集群巡天和南方巡天。 除了将于2009年开始的南方巡天外，所有这些都已经提供了数据。 该团队将改进他们的算法，以在尺寸，年龄和距离的参数空间的新区域中搜索微弱的矮星系。 后续的观测包括更深层次的光度学和光谱学，将测量新候选矮星的质量、金属丰度和其他基本性质。 这项工作将产生一个具有广泛内在特性的超微弱矮星样本，在银河系周围的统计学上具有显著意义。一名博士后研究员以及研究生和本科生将在参与这项研究时接受培训。 Willman博士和Geha博士将根据这项研究开发和传播高等本科银河天文学课程的课程资源。 博士后研究员将有机会在哈弗福德学院获得密切指导的本科教学经验。 该团队将创建一个wiki来编辑和维护有关本星系群矮星系的信息。