中国科学院云南天文台学术报告通知

2026年第48期

报告题目：Diversity of stripped-envelope supernova light curves from interaction with binary-driven circumstellar material
报告人：魏丹丹 博士后
报告人单位：奥地利科学技术研究所(ISTA)
报告语言：英文
报告时间：2026年9月18日（星期五）10:00-11:00
报告地点：科研1号楼412会议室

报告摘要：

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A growing number of core-collapse supernovae (CCSNe) exhibit diverse light-curve morphologies that indicate strong interaction with dense, pre-existing circumstellar material (CSM). Understanding the physical origin of such CSM is essential for exploring the late-stage evolution of SN progenitors. Non-conservative mass transfer during binary interactions provides a promising channel for producing dense CSM before core collapse. Using the stellar evolution code MESA, we simulate post-common-envelope binaries that give rise to ultra-stripped progenitors and self-consistently construct the CSM from mass loss during binary evolution. We further analytically predict the resulting bolometric and radio light curves by following the shock dynamics of SN ejecta interacting with the CSM. We find that surface-radius variations in the ultra-stripped progenitors trigger multiple episodes of mass transfer and produce diverse CSM density profiles, including detached shells and multi-peaked structures. Interaction with such CSM gives rise to non-monotonic, multi-peaked optical and radio light curves that qualitatively resemble features observed in some stripped-envelope SNe. Long-term multi-wavelength monitoring of stripped-envelope SN candidates, particularly at late times, will be crucial for probing structured CSM and constraining the mass-loss history of stripped progenitors. Our results suggest that SN-CSM interaction in binaries hosting ultra-stripped progenitors provides a possible channel for producing diverse light-curve morphologies, highlighting a potential connection between the pre-SN evolution of massive binary stars and the diversity of their explosive transients.

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报告人简介： 

魏丹丹现为奥地利科学技术研究所（ISTA）博士后，2021年获中国科学院云南天文台天文学博士学位，此后曾在德国海德堡从事两年博士后研究。她主要研究大质量双星的演化及其最终命运、引力波并合事件的前身星系统，以及相互作用型超新星。

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：柳正伟、姜登凯