应兰州大学物理学院杨捷副教授邀请， 康奈尔大学刘彬博士后近日来访我校并做学术报告。欢迎广大师生届时参加！

题目：Binary Mergers in Tertiary-induced Channel

报告人：刘彬 博士后

时间：2020年11月26日（周四）下午16：00

地点：格致楼3022

联系人：杨捷 副教授

报告摘要:

The detections of gravitational waves (GWs) from merging binary black holes (BHs) have motivated many studies on the dynamical formation of such compact black hole binaries (BHBs). Recent works have suggested that tertiary-induced merger via Lidov–Kozai (LK) oscillations may play a significant role in producing the BHBs detected by the LIGO/VIRGO collaboration. I will talk about the dynamics of merging compact binaries near a rotating supermassive black hole (SMBH) in a hierarchical triple configuration, including various general relativistic (GR) effects. I will show that these GR effects significantly increase the merger fraction of BHBs and produce a wide range of spin orientations when the BHB enters LIGO band. I will also discuss the hierarchical BH mergers in multiple systems, focusing on the constraints on the formation of GW190412, GW190814 and GW190521-like events.

报告人简介：

Dr. Bin Liu (刘彬) received his Bachelor and Master degree in physics from Lanzhou University in 2009 and 2012, respectively, and obtained his Ph.D. in Astronomy from University of Science and Technology of China (USTC) in 2016. After that, he worked as a postdoc fellow at Shanghai Astronomical Observatory and research associate at Cornell University since 2018. In Jan. 2021, he will move to the Niels Bohr Institute (NBI) at University of Copenhagen. Dr. Bin Liu’s primary research interests include formation of merging black hole binaries, gravitational waves, dynamics of nuclear star cluster and formation of exoplanets.