报告人：陆由俊 教授（中国科学院大学）

题目：双中子星：并合、千新星/合并新星及其宿主星系 Binary Neutron Stars: Mergers, Kilonovae/Merger-novae, and Their Host Galaxies

时间：2026年6月12日（周五）下午15:00

地点：理工楼1226

邀请人：王永强、郭文帝

报告摘要：

双中子星并合是重要的多信使实验室，可用于探测极端引力场和核密度条件下的相对论性过程。要解读当前及未来的观测数据，需要构建物理上自洽的模型，将双星形成与演化渠道同并合动力学及其产生的电磁对应体联系起来。在本次讲座中，我们将首先回顾观测现状——从银河系内的双中子星种群，到GW170817和GW190425的多信使探测；随后，我们将介绍一个综合性的种群演化合成模型，用于研究银河系及宇宙历史中双中子星的形成与演化，该模型能够将前身星渠道与可观测的并合性质联系起来。我们还将引入一个唯象的千新星/合并新星模型，以捕捉已观测事件的关键电磁信号特征。基于这些框架，我们将估算宇宙中的双中子星并合率密度，预测千新星的可观测性质，并刻画其可能的宿主星系环境。最后，我们将展望未来针对双中子星并合的多信使研究前景。 

Binary neutron star mergers are premier multi-messenger laboratories, probing relativistic processes in extreme gravitational fields and nuclear-density regimes. Interpreting current and future observations requires physically consistent models that connect binary formation and evolutionary channels to merger dynamics and the emergent electromagnetic counterparts. In this talk, we will review the observational landscape, from Galactic binary neutron star populations to the multi-messenger detections of GW170817 and GW190425, and then present a comprehensive population synthesis model for the formation and evolution of binary neutron stars in the Galaxy and across cosmic time that links progenitor channels to observable merger properties. We will introduce a phenomenological model for kilonovae/merger-novae that captures the key electromagnetic signatures of observed events. We will then use these frameworks to estimate the cosmic BNS merger rate density, predict kilonova observables, and characterize likely host-galaxy environments. The talk will conclude with prospects for upcoming multi-messenger studies of binary neutron star mergers.

报告人简介：

陆由俊，中国科学院大学教授，中国国家天文台研究员。1992年获安徽大学物理学学士学位，1997年获中国科学技术大学天体物理学博士学位。主要研究方向包括引力波天体物理、黑洞物理、活动星系核、星系与宇宙学。目前担任中国国家天文台引力波天体物理研究组负责人。

Youjun Lu is a professor at the University of Chinese Academy of Sciences and a researcher at the National Astronomical Observatories of China. Heobtained his BScin physics in 1992 from Anhui University and PhD in astrophysics in 1997 from University of Science and Technology of China. Hisprimary researchinterests include gravitational wave astrophysics, black hole physics, active galactic nuclei, galaxies and cosmology.Currently, heleads theGravitationalWaveAstrophysicsResearchGroup in the National Astronomical Observatories of China.