邀请人 (Invited by): 张建东

时间 (Time): 星期五，2023/04/14-10：00-11：30

地点 (Location): 珠海校区天琴中心1416会议室

摘要 (Abstract): 

We have developed approximate "analytic kludge" waveforms to describe the inspiral of a stellar-mass compact object into a supermassive compact object (SMCO) in an extreme mass ratio inspiral (EMRI) scenario. The deformability of the SMCO is characterized by a dimensionless quantity called the tidal Love number (TLN). Our analysis shows that, up to the leading order of the mass ratio, the conservative dynamics of the EMRI are not affected by tidal interaction, and the tidal effect is only present in the induced quadrupole moment. We have calculated the energy and angular momentum fluxes and obtained leading order corrections to the orbital evolution equations. By comparing the waveforms with and without tidal interaction, we demonstrate that even a small TLN can produce significant differences in the waveforms, which can be detected by space-borne detector LISA. Finally, using the Fisher information matrix method, we have performed parameter estimation for the TLN and found that the precision can reach the level of 10^{-4} in suitable scenarios.

主讲人简介 (Speaker's CV): 

李鹏程，华南理工大学副教授，2013年本科毕业于兰州大学，2018年于北京大学获得理论物理博士学位。之后分别在中山大学和北京大学从事博士后研究。研究方向为引力波物理、黑洞物理和引力理论。主持国家自然科学基金2项和中国博士后科学基金1项。目前已在JHEP, PRD, EPJC等期刊发表学术论文二十余篇，总引用约九百余次。