RUI: Search for a Stochastic Background of Gravitational Waves Using the Normal Modes of the Earth (Physics)

RUI：利用地球的简正模态搜索引力波的随机背景（物理学）

• 批准号: 8712241
• 负责人: Stephen Boughn
• 金额: $ 1.5万
• 依托单位: Haverford College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1990-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8712241&HistoricalAwards=false
• 关键词: RUI; Search; Stochastic; Background; Gravitational

Background radiations which bathe the Universe provide important clues to the history of the Universe and can even influence its evolution. A search for a background of gravitational radiation in the mHz frequency range by observing the normal modes of the earth shall be undertaken. The approximately two hundred station-years of data collected by the Project IDA global network of seismometers will be analyzed to look for any residual excitations of the quadrupole modes of the earth. In addition a calculation of the level of excitations of these modes by known terrestrial sources will facilitate the evaluation of the ultimate usefulness of the earth as a gravitational wave detector.

沐浴在宇宙中的背景辐射为了解宇宙的历史提供了重要线索，甚至可以影响它的演化。应通过观测地球的正常模式，在兆赫频率范围内寻找引力辐射的本底。将分析IDA项目全球地震仪网络收集的大约200个台站年的数据，以寻找地球四极模的任何剩余激发。此外，计算已知地面源对这些模式的激发程度将有助于评估地球作为引力波探测器的最终用处。