报告题目：Strongly lensed SNe & plasma lensing

报 告 人：尔欣中教授（云南大学）

报告时间：2023年10月30日（周一）下午14:00

报告地点：物理科学与技术学院新楼D-505多功能厅

报告摘要：

The strongly lensed SNe are fairly rare events, but they can provide interesting results, not only for the precise time delay measurement between lensed images, but also constraints to the SNe properties. We simulate the lensed SNe including the microlensing effect.

In the other work, I would like to introduce the ‘plasma lensing’. Besides gravity, the ionized plasma in the universe can deflect the propagation of the light as well. Unlike the gravitational lensing, the plasma lensing has frequency dependence, and only becomes significant at radio bands. Thus the typical sources of the plasma lensing are QSO, pulsars, FRBs, all of which are point-like sources. Thus the magnification and time delay effects are the two interesting properties in plasma lensing. We can see that it will change the dispersion relation and Faraday rotation relation.

报告人简介：

Xinzhong Er got his PhD from Bonn University in 2010, and spent 4 years in NAOC, Beijing. After that he worked for Euclid project in Observatory of Roma, INAF. He joined Yunnan University at the end of 2017. His main research interesting is cosmology, in particular using gravitational lensing to study the dark universe. Recently, he also studies the deflections of radio signal by plasma.

邀 请 人：廖恺教授