Titile: 天琴引力波天文学及数据处理/ TianQin Gravitational-Wave Astronomy and Data Analysis

Speaker: 胡一鸣

Institute: 中山大学

Host：余思悦

Time：2026年10月22日 周四 14:30

Location：物理楼552

Abstract：

毫赫兹引力波信号包含着双星演化、黑洞形成及星系核区动力学的信息。要想通过引力波探测器探究这些天体过程，首先需要明确探测器能够测得什么，以及不同观测设备联合后能够增加什么信息。在这个报告中，我将介绍本团队围绕天琴引力波探测计划所开展的研究。我们系统量化了天琴对主要波源的探测和参数测量能力，牵头完成《天琴引力波天文学白皮书》，为天琴科学目标与探测指标的确立提供了依据。在联合观测方面，本团队研究了天琴与其他引力波探测器的组网效果：所考察的方案能够显著改善波源定位，增强对随机引力波背景各向异性的探测能力；更准确的定位也有助于寻找电磁对应体，开展多信使观测。获得可信的天文学结论还依赖于可靠的数据分析。本团队此前澄清了LIGO候选事件统计显著度评估中的长期分歧，并针对天琴的观测特点发展了信号识别与参数分析方法。报告将讨论这些结果的科学依据、适用条件，以及未来观测中仍需解决的问题。

Millihertz gravitational-wave signals carry information about binary evolution, black hole formation, and dynamics in galactic nuclei. To investigate these astrophysical processes with gravitational-wave detectors, we must first establish what the detectors can measure and what additional information joint observations can provide. In this talk, I will present our team’s research on the TianQin gravitational-wave mission. We have systematically quantified TianQin’s ability to detect and measure the parameters of major source classes. We also led the preparation of the White Paper on TianQin Gravitational-Wave Astronomy, which helped establish TianQin’s scientific goals and detection requirements. For joint observations, we have studied networks combining TianQin with other gravitational-wave detectors. The configurations examined can substantially improve source localization and sensitivity to anisotropies in the stochastic gravitational-wave background. More precise localization also helps identify electromagnetic counterparts and enables multimessenger observations. Reliable data analysis is equally essential to trustworthy astronomical conclusions. Our team previously resolved a longstanding disagreement over how to assess the statistical significance of LIGO candidate events, and has developed methods for signal identification and parameter analysis tailored to TianQin’s observing characteristics. The talk will discuss the scientific basis and conditions of applicability of these results, as well as questions that remain for future observations.

Bio：

胡一鸣，教授，博士生导师，2011年本科毕业于南京大学，2015年博士毕业于格拉斯哥大学。先后在德国马普引力所、清华大学等任职博士后。曾作为LIGO科学合作组成员参与首起引力波事件探测。主持国家自然科学基金两项，主持、参与国家重点研发计划课题、国自然重点项目等多项国家级、省部级项目。合作发表论文逾百篇，其中作为主要作者发表论文六十余篇。曾获国际天文学奥赛铜牌、与LIGO科学合作组分享2016年基础物理学突破特别奖等国际奖项。

Yiming Hu is a professor and doctoral supervisor. He received his bachelor’s degree from Nanjing University in 2011 and his PhD from the University of Glasgow in 2015. He subsequently held postdoctoral positions at the Max Planck Institute for Gravitational Physics in Germany and Tsinghua University, among other institutions. As a member of the LIGO Scientific Collaboration, he participated in the detection of the first gravitational-wave event. He has led two projects funded by the National Natural Science Foundation of China and has led or participated in several other national and provincial research projects, including projects under China’s National Key Research and Development Program and key projects of the National Natural Science Foundation. He has coauthored more than 100 papers, including over 60 as a leading author. His honors include a bronze medal at the International Astronomy Olympiad and a share of the 2016 Special Breakthrough Prize in Fundamental Physics awarded to the LIGO Scientific Collaboration.

Related papers:

1. Gravitational Wave Astronomy With TianQin (AKA:  The TianQin Astro white paper) https://arxiv.org/abs/2409.19665

2. Detection of astrophysical gravitational wave sources by TianQin and LISA https://arxiv.org/abs/2307.16628

3. 空间引力波探测数据处理  https://www.sciengine.com/SSPMA/doi/10.1360/SSPMA-2024-0357