Home | Contact | Sitemap | 中文 | CAS
Search:
About Us Research People International Cooperation News Education & Training Join Us Journals Papers Resources Links
Location: Home > News > Seminars
News
  • Events
  • DAMPE
  • Seminars
  • Research Trends
  • Electrodynamics inside and outside the magnetar

     

     

    Seminar Title  

    Electrodynamics inside and outside the magnetar

       
    Speaker:   Dr LI Xinyu
       

     Affiliation:    

     (Columbia University )
       
    When

    Monday afternoon, Aug. 27, 14:00 p.m

       

    Where:   

    Room 502, Astronomy Building
     

                             Welcome to Attend   

     
      ( PMO Academic Committee & Academic Circulating committee)
     

       Abstract: The ultra-strong magnetic fields of magnetars have a profound implication of radiative and timing phenomena. We studied the dynamics of strong magnetic fields inside and outside magnetars. Inside the magnetar, the strong magnetic stress can break the crust by triggering plastic failures. We studied the interaction of magnetic fields and plastic failures in two scenarios. 1. We propose that magnetar outbursts are consequences of plastic flow triggered by Hall waves generated from the core-crust interface. 2. Alfven waves produced by giant flares can also initiate crustal plastic flow and give rise to the delayed thermal afterglow. The crustal absorption of Alfven is competed by magnetospheric dissipations outside the magnetar. Using a high order simulation of Force-Free Electrodynamics (FFE), we found that the magnetospheric dissipation of Alfven waves is generally weak and most wave energy will dissipate inside the magnetar. If time permits, I will also discuss the implication of plastic failures on magnetar heating and timing anomalies. 

     

     

    Copyright © Purple Mountain Observatory, CAS, No.8 Yuanhua Road, Qixia District, Nanjing 210034, China
    Phone: 0086 25 8333 2000 Fax: 8333 2091 http://english.pmo.cas.cn