The Mass Distribution and Evolution of Galaxy Groups

星系群的质量分布和演化

• 批准号: 0506628
• 负责人: Eric Wilcots
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506628&HistoricalAwards=false
• 关键词: Mass; Distribution; Evolution; Galaxy; Groups

AST-0506628WilcotsThe vast majority of galaxies, including the Milky Way, reside in loose collections called groups, which means that a thorough understanding of galaxy evolution cannot be achieved without considering the role of groups. X-ray and optical studies so far seem to show that the physical characteristics of groups deviate significantly from those of larger clusters. Groups dominated by spiral galaxies differ dramatically from groups dominated by ellipticals. This broad observational study of galaxy groups at low and intermediate redshift is designed to address two fundamental questions: what is the true distribution of mass in groups, and how have groups evolved over time? The principal (radio) observations will include an HI survey, a deep continuum survey, a study of bent radio sources, and a pilot experiment to map the diffuse continuum emission. Complementary optical observations will also be brought to bear on this study.Broader impacts center on the Universe in the Park program of public outreach, involvement of undergraduate students in the research, and a continued commitment to attracting underrepresented minorities.

绝大多数星系，包括银河系，都居住在称为星系群的松散集合中，这意味着如果不考虑星系群的作用，就无法彻底理解星系的演化。到目前为止，X射线和光学研究似乎表明，星系群的物理特征与较大星系团的物理特征明显背离。由螺旋星系主导的星系群与由椭圆形星系主导的星系群截然不同。这项对低红移和中等红移星系群的广泛观测研究旨在解决两个基本问题：星系群中质量的真实分布是什么，以及星系群是如何随着时间的推移而演变的？主要的(无线电)观测将包括HI调查、深度连续调查、弯曲射电源的研究以及绘制漫射连续辐射地图的试点实验。补充的光学观察也将应用于这项研究。Broader Impact以公园中的宇宙为中心，公共推广计划，本科生参与研究，并继续致力于吸引代表性不足的少数族裔。