GenASiS: General Astrophysical Simulation System. II. Self-gravitating Baryonic Matter

Abstract

GenASiS (General Astrophysical Simulation System) is a code being developed initially and primarily, though not exclusively, for the simulation of core-collapse supernovae on the world's leading capability supercomputers. This paper -- the second in a series -- documents capabilities for Newtonian self-gravitating fluid dynamics, including tabulated microphysical equations of state treating nuclei and nuclear matter (`baryonic matter'). Computation of the gravitational potential of a spheroid, and simulation of the gravitational collapse of dust and of an ideal fluid, provide tests of self-gravitation against known solutions. In multidimensional computations of the adiabatic collapse, bounce, and explosion of spherically symmetric pre-supernova progenitors -- which we propose become a standard benchmark for code comparisons -- we find that the explosions are prompt and remain spherically symmetric (as expected), with an average shock expansion speed and total kinetic energy that are inversely correlated with the progenitor mass at the onset of collapse and the compactness parameter.

Version accepted by Astrophysical Journal Supplement Series

References in corpus (24)

• Black Hole Formation in Failing Core-Collapse Supernovae
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• A New Open-Source Code for Spherically-Symmetric Stellar Collapse to Neutron Stars and Black Holes
• Exploring the relativistic regime with Newtonian hydrodynamics: An improved effective gravitational potential for supernova simulations
• Hydrodynamics of core-collapse supernovae and their progenitors
• A new multi-dimensional general relativistic neutrino hydrodynamics code for core-collapse supernovae. I. Method and code tests in spherical symmetry
• Fornax: a Flexible Code for Multiphysics Astrophysical Simulations
• Improved constrained scheme for the Einstein equations: An approach to the uniqueness issue
• Waveless Approximation Theories of Gravity
• Turbulent Magnetic Field Amplification from Spiral SASI Modes: Implications for Core-Collapse Supernovae and Proto-Neutron Star Magnetization
• An Improved Multipole Approximation for Self-Gravity and Its Importance for Core-Collapse Supernova Simulations
• An axis-free overset grid in spherical polar coordinates for simulating 3D self-gravitating flows
• Generation of Magnetic Fields by the Stationary Accretion Shock Instability
• Chimera: A massively parallel code for core-collapse supernova simulation
• Equation of State and Progenitor Dependence of Stellar-Mass Black-Hole Formation
• Possible explanation for star-crushing effect in binary neutron star simulations
• Stochasticity and efficiency of simplified core-collapse supernova explosions
• An Extension of the Athena++ Framework for Fully Conservative Self-Gravitating Hydrodynamics
• GenASiS: General Astrophysical Simulation System. I. Refinable Mesh and Nonrelativistic Hydrodynamics
• Targeting GPUs with OpenMP Directives on Summit: A Simple and Effective Fortran Experience
• thornado-hydro: a discontinuous Galerkin method for supernova hydrodynamics with nuclear equations of state
• Energy conserving and well-balanced discontinuous Galerkin methods for the Euler-Poisson equations in spherical symmetry
• Turbulence and magnetic field amplification from spiral SASI modes in core-collapse supernovae
• Fluid Dynamics in Curvilinear Coordinates without Fictitious Forces