Numerical Experiments on Electron-Positron Production Near Compact Astrophysical Objects

主讲人 (Speaker): 
Yuran Chen Alexander
主讲人单位 (Speaker's Institute): 
Princeton University
邀请人 (Invited by): 
谭柏轩
时间 (Time): 
星期四, 2018/07/19 - 10:30 to 11:30
地点 (Location): 
珠海校区海滨红楼17栋107 (Rm 107, Red House 17)
摘要 (Abstract): 

        Near extreme astrophysical objects like neutron stars andblack holes, magnetic field evolution often requires dense plasma to conduct the required electric current. In the case when such plasma is not available, a small amount of seed particles can be accelerated to high energies and initiate a pair cascade, producing copious electrons and positrons in-situ. This mechanism is believed to be responsible for the emission from rotation-powered pulsars, the erratic X-ray bursts from magnetars, and providing the current in the jet funnel of low luminosity accreting supermassive black holes. I will talk about my first-principle numerical simulations on these systems and how they can help to solve some long-standing observational/theoretical problems in high energy astrophysics.

 

主讲人简介 (Speaker's CV): 
Princeton University,Department of Asrtophysical Sciences, Princeton, NJ Postdoctoral Reasearch Associate, Sept.2017-Present Columbia University, New York, NY Ph.D. in Physics, Aug.2017 Adviser: Professor Andrei M.Beloborodov Area of Study:High-energy Astrophysics Hong Kong University of Science and Technology(HKUST), Hong Kong B.S., June 2010 Bachelor of Science in Physics, and Bachelor of Science in Mathematics, under a Dual Program Designation Cumulative Grade Average:A