60周年校庆系列讲座－－8月8日王兆军教授：The magnetic phase transition in relativistic ……

　　主题：The magnetic phase transition in relativistic degenerate electron gas and the observed evidences in magnetars    
　　主讲人：王兆军教授
　　地 点：屏峰校区理学A楼110
　　时 间：2013年8月8日（周四）9:00-10:00
　　主办单位：理学院
　　联系电话：85290306
    
　　主讲人简介：
　　王兆军，新疆大学物理系教授，主要研究方向为理论天体物理。
    
　　讲座摘要：
　　The electron gas inside a neutron star is highly degenerate and relativistic. Due to electron–electron magnetic interactions, the differential susceptibility can equal or exceed one, which causes the magnetic system of the neutron star to become metastable or unstable. The Fermi liquid of nucleons under the crust can be in a metastable state, while the crust is unstable to the formation of layers of alternating magnetization. The change of the magnetic stress acting on adjacent domains can result in a series of shifts or fractures in the crust. The release of magnetic free energy and elastic energy in the crust can cause the bursts observed in magnetars. Simultaneously, a series of shifts or fractures in the deep crust that is closed to the Fermi liquid of nucleons can trigger a phase transition of the Fermi liquid of nucleons from a metastable state to a stable state. The magnetic free energy released in the Fermi liquid of nucleons corresponds to the giant flares observed in some magnetars.