Improved Models of Stellar Core Collapse and Still no Explosions: What is Missing?

Details Improved Models of Stellar Core Collapse and Still no Explosions: What is Missing? Improved Models of Stellar Core Collapse and Still no Explosions: What is Missing?

2003-03-07

arxiv.org/abs/astro-ph/0303171v1

Phys.Rev.Lett.90:241101,2003

Astronomy and Astrophysics

Astrophysics

PRL submitted; 3 eps figures, 1 colored, high-quality available upon request

Scientific paper

10.1103/PhysRevLett.90.241101

Two-dimensional hydrodynamic simulations of stellar core-collapse with and without rotation are presented which for the first time were performed by solving the Boltzmann equation for the neutrino transport including a state-of-the-art description of neutrino interactions. Although convection develops below the neutrinosphere and in the neutrino-heated region behind the supernova shock, the models do not explode. This suggests missing physics, possibly with respect to the nuclear equation of state and weak interactions in the subnuclear regime. However, it might also indicate a fundamental problem of the neutrino-driven explosion mechanism.

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