RUI: Local Supercluster Studies

RUI：本地超星系团研究

• 批准号: 8713394
• 负责人: G. Lyle Hoffman
• 金额: $ 7.16万
• 依托单位: Lafayette College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-10-01 至 1991-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713394&HistoricalAwards=false
• 关键词: RUI; Local; Supercluster; Studies

The research will be a continuation of studies of the Virgo Cluster of galaxies, its local supercluster, and related galaxy systems. The proposed work is largely observational, using the Arecibo telescope to observe the 21 centimeter spectral line of neutral hydrogen (HI) to study the gas content and internal dynamics of dwarf galaxies in Virgo, in low density regions behind Virgo and toward the supercluster pole, and around groups of galaxies within the local supercluster. The global HI properties of these galaxies will allow a critical comparison of these observations with N-body simulations which should resolve questions concerning mass segregation, recent theories of biased galaxy formation, and various mechanisms of morphological segregation and HI deficiencies. The new HI data, along with data from other sources, will extend the Tully-Fisher correlation between the blue color magnitude (luminosity) and HI profile width of the spectral line to the quite small dwarf galaxies which constitute the dominant population of most galaxy groups. Undergraduate students will be directly involved in the research.

这项研究将是对处女座星系团、其本地超星系团以及相关星系系统研究的继续。这项拟议的工作主要是观测性的，使用阿雷西博望远镜观测21厘米的中性氢(HI)谱线，以研究处女座矮小星系的气体含量和内部动力学，这些矮小星系位于处女座后面的低密度区域，朝着超星系团的极点，以及在局部超星系团内的星系群周围。这些星系的全球HI属性将允许将这些观测与N体模拟进行关键比较，N体模拟应该解决有关质量分离、最近有偏见的星系形成理论以及形态分离和HI缺陷的各种机制的问题。新的HI数据与其他来源的数据一起，将把蓝色星等(光度)和HI谱线宽度之间的Tully-Fisher关联扩展到构成大多数星系群的主要群体的相当小的矮星系。本科生将直接参与这项研究。