活动
【DoA Colloquium】December 16th by Zhoujian Cao
Description
Title: Compact Binary object Coalescencealong eccentric orbit---From Template to Science
Speaker: Zhoujian Cao (Academy of Mathematics and Systems Science, CAS)
Abstract:
With the increasing discovery of novel and significant gravitational wave events by ground-based gravitational wave detectors, the development of gravitational wave astronomy is in full swing. The success of space-based laser interferometric detectors such as LISA Pathfinder, Taiji-1, and TianQin-1 has led to growing research investments in space-based gravitational wave detection by more countries and research teams. Currently, Europe and the United States have officially launched the LISA space-based gravitational wave detection project. Meanwhile, China's Taiji, TianQin, and Japan's DECIGO space-based gravitational wave detection projects are also advancing actively. Under the favorable collaboration and competition dynamics among these four initiatives, space-based gravitational wave detectors will begin operation in a decade. Gravitational wave theoretical templates serve as a crucial theoretical foundation for gravitational wave data processing. This report will begin with an overview of the current status of ground-based gravitational wave detection and data analysis, compare the requirements for gravitational wave theoretical templates needed for expected space-based detection, and introduce the current progress in modeling for space-based gravitational wave detection. Elliptical orbit binary merger systems have recently garnered widespread attention as gravitational wave sources, driven by space-based gravitational wave detection and observed events such as GW190521. This report will also delve into the profound scientific implications of gravitational wave events from elliptical orbit binary mergers.
Bio:
国家自然科学基金委优秀青年基金获得者，国家重点研发计划项目负责人，国家自然科学基金委重大项目课题负责人，专门从事引力波天文学特别是数值相对论的研究。曹周键与合作者一起建立和改进了数值相对论计算方法Z4c。Z4c算法已被国际数值相对论界众多数值相对论小组使用并被日本专家写入其编写的数值相对论教科书。曹周键他们完成和发展了中国完全独立自主的数值相对论软件，该软件为国内若干同行提供了数值相对论研究的工具。他们还建立了椭圆轨道双黑洞并合系统旋进-并合-铃宕完备引力波模板SEOBNRE。该模板是世界上首个能同时描述自旋和椭圆轨道的引力波模板，被LIGO数据分析人员成功应用于引力波实测数据，并引发科学家提出活动星系核双黑洞形成新机制。
Time: 14:00-15:00, 16/December, Tuesday
Venue: Room 506 (Large seminar room), Department of Astronomy
You can also access the colloquium via: https://www.koushare.com/space/329883/live
Note: This talk is in Chinese.
