报告题目: The Effect of Reaction Rate on the Pre-supernovae Core Structure and Nucleosynthesis
报告人: 辛文宇 博士
报告人单位: 北京师范大学
报告语言: 中文
报告时间: 2023年10月25日(星期三)上午10:00-11:30
报告地点: 1号楼412会议室
报告摘要:
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The gravitational-wave (GW) signal GW190521 detected by LIGO/Virgo seems to originate from a merger of binary BHs between 60-90 solar masses and the probability that at least one of them falls in the BH mass-gap due to pair-instability supernovae is 99.0%, which challenged the stellar evolution theory and motivated many attempts to examine the effects of uncertainties involved in the stellar evolution. In this talk, we focus on how the 12C(α, γ)16O reaction rate affects the evolution of massive stars with the initial masses of M (ZAMS) = 13-40 solar masses and solar metallicity. It is shown that the final fates of these stars, i.e., the formation of a neutron star or a black hole, are sensitive to the strength of convective shell burning. Based on the strength of convective shell burning, we proposed a promising two-parameter criterion to predict the explodability of the presupernovae.
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报告人简介:
辛文宇,现为北京师范大学天文系博士后,LAMOST 特聘青年研究员。2019年在中国科学院近代物理研究所取得硕士学位。2022年在国家天文台取得博士学位(赵刚研究员与东京大学Kavli IPMU的Ken'ichi Nomoto教授共同指导)。目前正在从事第一代恒星以及第一代超新星相关的研究。2023年,受Springer出版社邀请,与Nomoto教授共同完成《Handbook of Nuclear Physics》一书中,章节“Stellar Evolution and Nuclear Reaction Rate Uncertainties”的撰写。
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云台邀请团组:大样本恒星演化组、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:柳正伟
10月24日