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The Einstein Toolkit: a community computational infrastructure for relativistic astrophysics
We describe the Einstein Toolkit, a community-driven, freely accessible computational infrastructure intended for use in numerical relativity, relativistic astrophysics, and other applications. The…
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Evolutions in 3D numerical relativity using fixed mesh refinement
We present results of 3D numerical simulations using a finite difference code featuring fixed mesh refinement (FMR), in which a subset of the computational domain is refined in space and time. We…
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pocl: A Performance-Portable OpenCL Implementation
TLDR
The proposed open source implementation of OpenCL is also platform portable, enabling OpenCL on a wide range of architectures, both already commercialized and on those that are still under research.
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3D collapse of rotating stellar iron cores in general relativity including deleptonization and a nuclear equation of state.
TLDR
This work focuses on gravitational wave (GW) emission from rotating collapse, bounce, and early postbounce phases and indicates that the GW signature of these phases is much more generic than previously estimated.
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Towards standard testbeds for numerical relativity
In recent years, many different numerical evolution schemes for Einstein's equations have been proposed to address stability and accuracy problems that have plagued the numerical relativity community…
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Optimized High-Order Derivative and Dissipation Operators Satisfying Summation by Parts, and Applications in Three-dimensional Multi-block Evolutions
TLDR
The constructed dissipation operators are effective in suppressing instabilities that are sometimes otherwise present in the restricted full norm case and are semi-definite with respect to the appropriate summation by parts scalar product.
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A NEW MONTE CARLO METHOD FOR TIME-DEPENDENT NEUTRINO RADIATION TRANSPORT
Monte Carlo approaches to radiation transport have several attractive properties such as simplicity of implementation, high accuracy, and good parallel scaling. Moreover, Monte Carlo methods can…
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A survey of high level frameworks in block-structured adaptive mesh refinement packages
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GENERAL-RELATIVISTIC THREE-DIMENSIONAL MULTI-GROUP NEUTRINO RADIATION-HYDRODYNAMICS SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE
We report on a set of long-term general-relativistic three-dimensional (3D) multi-group (energy-dependent) neutrino radiation-hydrodynamics simulations of core-collapse supernovae. We employ a full…
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Recoil velocities from equal-mass binary-black-hole mergers.
TLDR
Using two independent methods it is shown that the merger of such binaries yields velocities as large as approximately 440 km/s for black holes having unequal spins that are antialigned and parallel to the orbital angular momentum.
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