US-France Cooperative Research: Large-Scale Clustering of Dwarf and Low-Brightness Galaxies

美法合作研究：矮星系和低亮度星系的大规模聚类

• 批准号: 8915623
• 负责人: Trinh Thuan
• 金额: $ 1.25万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8915623&HistoricalAwards=false
• 关键词: US; France; Cooperative; Research; Large

This award will support collaborative research in galactic astronomy between Dr. Trinh Thuan, University of Virginia and Dr. Rene Pellat and Jean-Michel Alimi of the Paris Observatory, Meudon, France. The objective of the proposed research is a study of the comparative distribution of dwarf and giant galaxies. The investigators propose to study the spatial distribution of dwarf and low-surface brightness galaxies in the northern hemisphere, using as the data base a 21 cm redshift survey developed by Dr. Thuan of approximately 1800 galaxies classified as dwarf, magellenic and irregular in the Uppsala General Catalogue of Galaxies. These data represent an important new source of information on the spatial distribution of intrinsically faint galaxies. Specifically, they will examine the clustering properties of dwarf galaxies, compared to those of bright galaxies. They also plan to compute other statistics, such as the mean number of dwarf galaxies associated with a bright galaxy of a given absolute margin. This type of statistic is of prime importance for the understanding of other astrophysical phenomena. The results of this project may have an important influence on present ideas on the "biassing" of galaxy formation and the question of whether the Universe contain enough dark matter to be closed. The project will benefit from the combined expertise of Dr. Thuan in dwarf galaxies and the French experience in statistical techniques to analyze galaxy clustering.

该奖项将支持银河系天文学的合作研究 弗吉尼亚大学的Trinh Thuan博士和Rene博士 来自默东巴黎天文台的佩拉特和让-米歇尔·阿利米， 法国 拟议研究的目的是研究 矮星系和巨星系的比较分布。 研究人员建议研究 北方矮星系和低表面亮度星系 半球，使用21厘米红移测量作为数据基础 由Thuan博士开发，对大约1800个星系进行了分类 在乌普萨拉总星表中， 的Galvanie。 这些数据代表了一个重要的新来源， 本征微弱的空间分布信息 星系 具体来说，他们将检查集群属性 与明亮星系相比，矮星系的亮度更高。 他们 我还计划计算其他统计数据，例如 与给定绝对值的明亮星系有关的矮星系 裕度 这类统计数据对于 了解其他天体物理现象。 的结果 该项目可能对目前的想法产生重要影响， 星系形成的“偏差”以及 宇宙中有足够的暗物质可以封闭 项目 将受益于图恩博士在侏儒症方面的综合专业知识 星系和法国的统计技术经验， 分析星系集群。