【4.21; Seminar】2026年粒子天体物理全国重点实验室系列学术报告 #13：Constraining Massive Star Evolution through Young Open Clusters

时间/Time: 2026年4月21日周二上午10:00 / Tuesday, April 21, 2026, 10:00 a.m.

地点/Location: 多学科楼312会议室 / Meeting Room 312, Multidisciplinary Building

报告人/Speaker: 王晨 助理教授（南京大学）/ Chen Wang (Nanjing University)

题目/Title: Constraining Massive Star Evolution through Young Open Clusters

主持人/Host: 李彦荣 研究员/ Yanrong Li

摘要/Abstract:

Massive stars are crucial in our understanding of many areas of modern astrophysics. Despite considerable efforts, there remain numerous unanswered questions regarding the formation and evolution of massive stars. Young star clusters are ideal laboratories to gauge stellar theory, because they are believed to be ensembles of co-eval stars with identical initial chemical compositions. Recent high-precision Hubble Space Telescope (HST) photometry reveals that the main-sequences (MSs) of young star clusters in the color-magnitude diagram are split into several components. This challenges the traditional view of star clusters. By studying these multiple MS components with dense grids of detailed single and binary evolution models, we suggest that stars may predominantly form in close binaries with moderately fast rotation (~50% of critical velocities). Additionally, binary mergers that occurred early on can result in slowly rotating stars. These factors, including stellar natal spins and binary statistics, can have a significant impact on the entire life of stars, from their MS stages to their eventual explosions.

个人简介/Biography:

王晨，本科及硕士毕业于南京大学天文与空间科学学院，2022年于德国波恩大学获得天体物理博士学位。2022年至2025年在德国马克斯普朗克天体物理研究所从事博士后研究，2025年加入南京大学，现任助理教授。主要研究方向为大质量恒星的结构和演化，特别是双星系统的演化。构建了当前国际领先、参数涵盖最广的精细双星演化模型之一，并基于该模型系统性研究了年轻疏散星团中恒星演化的特征。相关成果发表于Nature Astronomy，ApJL等国际一流期刊。