Date: Monday 26-March-2018
Time: 15:30-16:30 (3:30-4:30 pm)
Location: PSC 1136
Speaker: Dr. Jonathan Zrake (Columbia University)
Title: "Relativistic Turbulence in Binary Neutron Star Mergers and AGN Jets"
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 of AGN jets, dissipating their electromagnetic power. This study reveals new evidence in favor of AGN jets as sources of ultra-high energy cosmic rays.
SPECIAL ACCOMMODATIONS:
Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.
