A COMPARISON OF TWO- AND THREE-DIMENSIONAL NEUTRINO-HYDRODYNAMICS SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE

We present numerical results on two- (2D) and three-dimensional (3D) hydrodynamic core-collapse simulations of an 11.2 M sub([middot in circle]) star. By changing numerical resolutions and seed perturbations systematically, we study how the postbounce dynamics are different in 2D and 3D. The calcula...

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Bibliographic Details
Published in:The Astrophysical journal 2014-05, Vol.786 (2), p.1-8
Main Authors: Takiwaki, Tomoya, Kotake, Kei, Suwa, Yudai
Format: Article
Language:English
Subjects:
APPROXIMATIONS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Computer simulation
COMPUTERIZED SIMULATION
DIFFUSION
DISTURBANCES
Dynamical systems
ENERGY DEPENDENCE
EXPLOSIONS
GRAVITATIONAL COLLAPSE
HYDRODYNAMIC MODEL
Instability
Mathematical models
NEUTRINOS
PERTURBATION THEORY
RESOLUTION
STOCHASTIC PROCESSES
Stochasticity
SUPERNOVAE
Three dimensional
THREE-DIMENSIONAL CALCULATIONS
Two dimensional
TWO-DIMENSIONAL CALCULATIONS
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Summary:We present numerical results on two- (2D) and three-dimensional (3D) hydrodynamic core-collapse simulations of an 11.2 M sub([middot in circle]) star. By changing numerical resolutions and seed perturbations systematically, we study how the postbounce dynamics are different in 2D and 3D. The calculations were performed with an energy-dependent treatment of the neutrino transport based on the isotropic diffusion source approximation scheme, which we have updated to achieve a very high computational efficiency. All of the computed models in this work, including nine 3D models and fifteen 2D models, exhibit the revival of the stalled bounce shock, leading to the possibility of explosion. All of them are driven by the neutrino-heating mechanism, which is fostered by neutrino-driven convection and the standing-accretion-shock instability. Reflecting the stochastic nature of multi-dimensional (multi-D) neutrino-driven explosions, the blast morphology changes from model to model. However, we find that the final fate of the multi-D models, whether an explosion is obtained or not, is little affected by the explosion stochasticity. In agreement with some previous studies, higher numerical resolutions lead to slower onset of the shock revival in both 2D and 3D. Based on the self-consistent supernova models leading to the possibility of explosions, our results systematically show that the revived shock expands more energetically in 2D than in 3D.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/786/2/83