[Triumf-seminars] TRIUMF Colloquium today at 14:00

postmaster at admin.triumf.ca postmaster at admin.triumf.ca
Fri Aug 17 05:00:01 PDT 2007


Date/Time: Fri 2007-08-17 at 14:00

Location:  Auditorium          

Speaker:   Hans-Thomas Janka (Max Planck Institute for Astrophysics, Garching)

Title:     How Do Massive Stars Explode? News on a Long-Standing Problem

Abstract: Two-dimensional hydrodynamic simulations with the most detailed neutrino transport applied in current stellar core-collapse models show that the neutrino-driven mechanism can trigger explosions at several 100 ms after core bounce, which is later than previously thought. The explosions are supported by a low-mode nonradial instability of the stalled accretion shock ("SASI"), which cooperates with convection, enhances the neutrino energy transfer to the postshock matter, and leads to a global anisotropy of the mass ejection. I will present the latest results of the Garching group and will address their implications for the supernova neutrino signal, pulsar kicks, and explosion asymmetries.

Stimulants available 15 minutes before the talk.

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