中国科学院云南天文台学术报告通知

2026年第21期

报告题目：How isolated binaries form gravitational-wave sources

报告人：徐啸天 博士

报告人单位：上海交通大学李政道研究所

报告语言：中文

报告时间：2026年4月13日（星期一）10:30-12:00

报告地点：科研1号楼412会议室

报告摘要：

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In the past decade, over two hundred gravitational-wave events have been detected, the majority originating from the mergers of binary black holes (BBHs). Understanding the origin of such systems is an essential part of gravitational-wave astronomy. The evolution of isolated binaries provides a natural way to form merging BBHs, with three primary channels identified: common envelope evolution (CEE), chemically homogeneous evolution (CHE), and stable mass transfer (SMT). This talk focuses on the CEE and SMT channels.

Part 1 (CEE): Theoretically abundant long-period Wolf-Rayet star/black hole + massive main-sequence star binaries are observationally rare. This discrepancy suggests that the role of the CEE channel may have been overestimated in past population synthesis calculations. We analyse this issue in the light of a new orbital evolution model, which is driven by mass ejection during the luminous blue variable stage, instead of classical mass transfer.

Part 2 (SMT): Conversely, recent studies indicate that the role of the SMT channel has been underestimated. We investigate this channel by constructing detailed binary evolution models continuously evolving from zero-age main sequence to BBH formation. We show that accretion-induced structural changes in the initial secondary star play a key role, naturally reproducing the observed mass-ratio peak (GWTC-4), which is not captured in other simulations.

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 报告人简介：

徐啸天，上海交通大学李政道研究所博士后研究员。在Norbert Langer教授的指导下，于德国波恩大学获得博士学位，此前于南京大学天文与空间科学学院，在李向东教授的指导下完成硕士和本科毕业论文。研究兴趣包括大质量双星演化，星族合成，X射线双星，引力波源的形成等。

云台邀请方：大样本恒星演化研究团组、国际超新星中心、云南省国际超新星研究重点实验室

邀请方联系人：葛宏伟