| 报告题目： |
Electrodynamics inside and outside magnetars |
| 报告人： |
Dr.Xinyu Li |
| 报告人单位： |
Canadian Institute for Theoretical Astrophysics & Perimeter Institute |
| 报告时间： |
2020年1月3日下午2:30 |
| 报告地点： |
东七楼427 |
| 邀请单位： |
粒子与天体物理研究所 |
| 报告摘要： |
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The ultra-strong magnetic fields of magnetars have profound implications for their radiative phenomena. We studied the dynamics of strong magnetic fields inside and outside magnetars. Inside the magnetar, the strong magnetic stress can break the crust and trigger plastic failures. The interaction between magnetic fields and plastic failures is studied in two scenarios: 1. Internal Hall waves launched from the core-crust interface can initiate plastic failures and lead to X-ray outbursts. 2. External Alfven waves produced by giant flares can also initiate crustal plastic failures which dissipate the waves and give rise to delayed thermal afterglow. The crustal dissipation of Alfven waves is competed by the magnetospheric dissipation outside the magnetar. Using a high order simulation of Force-Free Electrodynamics (FFE), we found that the magnetospheric dissipation of Alfven waves is generally slow and most wave energy will dissipate inside the magnetar. |
| 报告人简介： |
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Research interests: High Energy Astrophysics, Magnetars, Magnetohydrodynamics, Force-Free Electrodynamics, Plasma Astrophysics, Cosmology, Large Scale Structure, Dark Matter, Galaxy Formation
2019/9-, Postdoctoral Fellow, Canadian Institute for Theoretical Astrophysics & Perimeter Institute
2019/8：Ph.D., Physics, Columbia University, USA
2013/7: M.Sc, Theoretical Physics, Perimeter Institute/ University of Waterloo, Canada
2012/7: B. Sc, Physics and Mathematics (Double Major), The University of Hong Kong, China
2008/7: Physics and Mathematics, Tsinghua University, China |
