Astrophysical Jets: Theoretical and Computational Investigations

Mittwoch, 7. Dezember 2016, 14:00 - 15:00
Veranstaltungsort* Library
Prof. Rachid Ouyed (University of Calgary)
Astrophysical Jets: Theoretical and Computational Investigations
 
Collimated outflows in the form of high mach/Lorentz number jets occur in many astrophysical environments. They are seen in young stellar objects, proto-planetary nebulae, compact objects (neutron stars and black holes), Active Galactic Nuclei and have become crucial in understanding Gamma-Ray Bursts. Though they differ vastly in scale, speed and energy, astrophysical jets show a remarkable similarity in their morphology, and show evidence for similar spatial and temporal variability. What physics do they share? These systems are either hydrodynamic (HD), magnetohydrodynamic (MHD) or purely electromagnetic (EM) in nature and are, as such, governed by highly non-linear coupled equations. In this talk I will give an overview of the theoretical aspects of jets while focusing mainly on our recent state-of-the-art High-Performance Computational  investigations (MHD simulations) of these intriguing phenomena. 3D MHD Simulations allowed us to gain new and deeper insight into the origin and behavior of jets with  implications to astrophysics in general and to High-Energy astrophysics in particular (e.g. Ultra-High Energy Cosmic Rays and Gamma-Ray Bursts). I will finish by briefly highlighting how our results and findings are providing some guidance and directions for future experiments of magnetically confined plasmas in the laboratories. 


: Rachid Ouyed