Investigations of a Statistically Complete Sample of Galaxy Clusters

对统计上完整的星系团样本的研究

• 批准号: 9119216
• 负责人: J. Patrick Henry
• 金额: $ 18.94万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119216&HistoricalAwards=false
• 关键词: Investigations; Statistically; Complete; Sample; Galaxy

The recently completed X-ray all-sky survey carried out by the ROSAT satellite can provide a sample of clusters of galaxies which has both well established quantifiable selection criteria and is in a contiguous region of the sky. To obtain this sample it is necessary to identify the clusters from the more numerous other sources. The Principal Investigator is only one of a few US astronomers who were invited to participate in the ROSAT survey and has access to this X-ray data well in advance of publication. This grant will provide support for follow-up optical studies of the cluster sample with particular emphasis on the initial identification of the clusters and later investigations of evolution of X-ray and optical properties, large scale structure, and the classical magnitude-redshift relation. Analysis of the ROSAT data will enable significant improvements over previous studies to be made.

最近完成的X射线全天空调查， ROSAT卫星可以提供星系团的样本， 既有完善的量化选择标准， 在天空中的一个连续区域。 为了获得这个样本， 有必要从更多的其他集群中确定集群 源 首席研究员只是美国少数几个 受邀参加ROSAT巡天的天文学家， 在发表之前就能接触到这些X光数据 这 该笔拨款将用于资助 特别强调初始的聚类样本 识别集群和随后的调查 X射线和光学性质的演变，大尺度结构， 以及经典的星等-红移关系。 分析 ROSAT数据将比之前有显着改进 要做的研究。