| 报告题目： |
Energy Sources of Superluminous Supernovae |
| 报告人： |
刘良端 博士 |
| 报告人单位： |
南京大学天文与空间科学学院 |
| 报告时间： |
2018年11月20日上午9:00-11:00 |
| 报告地点： |
东七楼，四楼427会议室 |
| 报告人简介： |
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刘良端，南京大学天文与空间科学学院博士。研究主要集中在理解宇宙高能现象背后的物理规律，研究对象包括伽马射线暴，超新星爆发，以及引力波电磁对应体等。2017年开始访问美国内华达州拉斯维加斯分校至今，从事超亮超新星的物理机制的研究。 |
| 报告摘要： |
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Superluminous supernovae (SLSNe) is a type of stellar explosion with a luminosity 10 or more times higher than that of standard supernovae. The physical origins of the extreme luminosity emitted by SLSNe are a hot topic in astrophysics research. In this talk, I will introduce multiple models for what conditions may produce an SLSN, including core collapse in particularly massive stars, millisecond magnetars, interaction with circumstellar material (CSM model).
In addition, I will introduce a general theory of homologous explosions with constant opacity, paying special attention on the evolution of the photospheric radius. We find that regardless of the density distribution profile, the photosphere always increases early on and decreases at late times. This general behavior can be used to quickly diagnose whether the source originates from a supernova-like explosion. |
