Persistent Gravitational Radiation: Sources and LIGO Detection

持续引力辐射：来源和 LIGO 探测

• 批准号: 0070935
• 负责人: Robert Wagoner
• 金额: $ 8.5万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070935&HistoricalAwards=false
• 关键词: Persistent; Gravitational; Radiation; Sources; LIGO

This research will analyze the evolution of those rapidly rotating neutron stars that could be sources of persistent quasi-periodic gravitational radiation. The initial focus will be on those neutron stars that have been spun up via continued accretion from a stellar companion. X-ray observations of such binary sources (such as those carried out by the Rossi X-ray Timing Explorer satellite) will be employed in order to identify promising targets. A parametrized model of the system, which describes the evolution of those properties that determine the gravitational wave frequency and amplitude, will be developed.The Stanford group has been identified by the Astrophysical Source Identification and Signatures Subgroup of the LIGO Scientific Collaboration to lead the effort to develop "robust algorithms" for detection of such sources. Such algorithms produce parametrized predictions of the time dependence of the gravitational radiation, which greatly facilitate its detection by LIGO and other laser interferometer detectors. This research is the first step toward this goal.

这项研究将分析那些快速旋转的中子星的演化，这些中子星可能是持久的准周期引力辐射源。最初的重点将放在那些通过恒星伴星的持续吸积而旋转起来的中子星上。将利用对这类双星源的X射线观测（如罗西X射线定时探测器卫星进行的观测）来确定有希望的目标。将建立一个系统的参数化模型，描述决定引力波频率和振幅的那些性质的演变。斯坦福大学小组已被LIGO科学合作组织的天体物理源识别和签名小组确定为领导开发探测此类源的“鲁棒算法”的努力。这种算法产生了引力辐射的时间依赖性的参数化预测，这极大地促进了LIGO和其他激光干涉仪探测器的探测。这项研究是实现这一目标的第一步。