S E M I N A R I

Departament d'Astronomia i Astrofísica
Universitat de València

    Magnetorotational instability in Core-Collapse Supernovae

Tomasz Rembiasz

Max Planck Institute for Astrophysics, Garching bei Munchen, Alemanya


Seminari del departament d'Astronomia i Astrofisica

Dimarts 01 abril 2014

11:00


Resum

The magnetorotational instability (MRI) is one of the most promising agents amplifying the magnetic fields in a core-collapse supernova explosion. Combining theoretical analysis and numerical simulations, we investigate whether magnetic fields can be increased to dynamically relevant strengths. We find that a secondary shear flow instability (Kelvin-Helmholtz) developing on top of MRI structures terminates the MRI driven amplification when the magnetic field strength has grown only by a constant factor of about twenty.