8-12 juin, 2014

Résumé

Core-Collapse Supernovae Explosions

Evan O'Connor (CITA)

Sean Couch, University of Chicago

For all massive stars with zero age main sequence masses greater than ~8-10 solar masses, the end stage of stellar evolution is the collapse of the iron core and the formation of either a neutron star or a black hole. The goal of core-collapse supernova theory for the last 50 years has been to understand how this implosion is transformed into an explosion. This is a great multiphysics problem, core-collapse supernovae tightly couple neutrinos, general relativity, nuclear physics, hydrodynamics, magnetic fields, and stellar evolution into one astrophysical environment.

In this talk, I will discuss our current understanding of core collapse theory and in particular, focus on the core-collapse supernovae central engine dynamics and what must be done in order to model these stellar explosions accurately. A big aspect of this modelling is the multidimensionality of the problem. It is now well established that modelling the iron core collapse of massive stars in spherical symmetry does not result in explosions, the problem is inherently multidimensional. Therefore, the current theoretical push is to model these beasts in higher dimensions. I will present high resolution FLASH simulations of core collapse in both two and three dimensions and discuss their propensity for explosion.

(doit être confirmé par le SOC)