JSI Seminar

Date
Mon, Mar 26, 2018 3:30 pm - 4:30 pm
Location
PSC 1136

Description

Title : Relativistic Turbulence in Binary Neurton Star Mergers and AGN Jets
Speaker Name: Jonathan Zrake
Speaker Institution : Columbia University
Notes: Refreshments available beginning at 3 PM.
Abstract : I will discuss relativistic turbulence in high energy astrophysics and present two recent advances in its theory and computation. First, I'll show that turbulence, driven during the merger of a binary neutron star (BNS) system, produces rapid dynamo action and ultra-strong magnetic fields in the merger remnant and may produce an X-ray transient detectable by Swift (/Integral/Fermi). I will discuss the implications for GW170817 and future multi-messenger BNS merger detections. Second, I will present new results regarding charged particle acceleration by jets in active galactic nuclei (AGN). By performing ab initio supercomputer simulations of relativistic plasma, we have found a new process that efficiently accelerates non-thermal particles. This mechanism accompanies the helical kink instability, which operates in the current-carrying spine AGN jets, dissipating their electromagnetic power. This study reveals new evidence in favor of AGN jets as sources of ultra-high energy cosmic rays.