Collaborative Research: An Empirical Blueprint for the Gravitational-Wave Background

合作研究：引力波背景的经验蓝图

• 批准号: 2414468
• 负责人: Chiara Mingarelli
• 金额: $ 31.31万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2414468&HistoricalAwards=false
• 关键词: Collaborative; Research; Empirical; Blueprint; Gravitational

Orbiting supermassive black holes in the centers of galaxies are thought to produce very low frequency gravitational waves that could be detected by careful timing of the arrival of radio pulses from pulsars through the ongoing pulsar timing array project. It is expected that the combined signals from many of these systems will produce a background noise that may soon be detectable by pulsar timing arrays. This project will use a new method based on observations of accreting supermassive black holes to provide an estimate of the strength of this background noise as well as it's distribution in gravitational wave frequencies. The project will use this new method to provide a framework for determining the history of the growth of supermassive black holes once the background noise is detected. The project will also create a Pulsar Search Collaboratory hub in New Jersey and New York that will involve high school students in the search for pulsars using real data. This award advances the goals of the Windows on the Universe Big Idea.The project will use observations of quasar luminosity functions at different redshifts combined with local observations of dual Active Galactic Nuclei to build an empirically-based model of the cosmological distribution of supermassive black hole binaries that will contribute to the stochastic gravitational wave background expected to be detected in pulsar timing array observation. This approach is complementary to the existing approach that is based on galaxy merger simulations. The new approach will determine key physical parameters that can be constrained through detection of the gravitational wave background. The project will also create a Pulsar Search Collaboratory hub in New Jersey and New York. The Pulsar Search Collaboratory is a long-standing NSF supported program that allows high schools students to search for pulsars with real radio data. It is a low-barrier way for students to experience science and scientific discovery.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

人们认为，星系中心的超质量黑洞被认为会产生非常低的频率引力波，可以通过正在进行的脉冲星定时阵列项目从脉冲星的到来的仔细计时来检测到，可以检测到。预计来自许多这些系统的组合信号将产生背景噪声，而脉冲星定时阵列可能很快就可以检测到。该项目将使用一种新方法，基于积聚超质量黑洞的观察结果，以估算该背景噪声的强度以及在引力波频率中的分布。该项目将使用这种新方法来提供一个框架，以确定一旦检测到背景噪声，超级质量黑洞的生长历史。该项目还将在新泽西州和纽约创建一个PULSAR搜索协作中心，该项目将涉及高中生使用真实数据搜索Pulsars。该奖项促进了宇宙大想法的窗户的目标。该项目将在不同的红移处使用Quasar Luminosity函数的观察，并结合当地对双重活性银河系核的观察结果，以建立一个基于经验的超级质量黑洞二元组的宇宙学模型，这些模型将有助于固定的重力波浪背景，以实现puls time time time time time time time time。这种方法与基于星系合并模拟的现有方法互补。新方法将确定可以通过检测重力波背景来限制的关键物理参数。该项目还将在新泽西州和纽约创建PULSAR搜索协作中心。 PULSAR搜索合作组织是一项长期以来的NSF支持计划，可让高中学生搜索具有真实无线电数据的Pulsars。这是学生体验科学和科学发现的一种低级损坏方式。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响评估标准，被认为值得通过评估来获得支持。