The Parallel Compact Object CALculator: An Efficient General Relativistic Initial Data Solver for Compact Objects
arXiv:2312.15328 · doi:10.3390/universe10050229
Abstract
Every numerical general relativistic investigation starts from the solution of the initial value equations at a given time. Astrophysically relevant initial values for different systems lead to distinct set of equations that obey specific assumptions tied to the particular problem. Therefore a robust and efficient solver for a variety of strongly gravitating sources is needed. In this work we present the OpenMP version of the Compact Object CALculator (COCAL) on shared memory processors. We performed extensive profiling of the core COCAL modules in order to identify bottlenecks in efficiency which we addressed. Using modest resources, the new parallel code achieves speedups approximately one order of magnitude relative to the original serial COCAL code, which is crucial for parameter studies of computationally expensive systems, such as magnetized neutron stars, as well as its further development towards more realistic scenarios. As a novel example of our new code we compute a binary quark system where each companion has a dimensionless spin of aligned with the orbital angular momentum.
arXiv comment26 pages, 6 figures
References in corpus (43)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Multi-messenger Observations of a Binary Neutron Star Merger
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- On the Numerical Integration of Einstein's Field Equations
- A single-domain spectral method for black hole puncture data
- Relativistic Numerical Method for Close Neutron Star Binaries
- A multidomain spectral method for solving elliptic equations
- Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817
- A constrained scheme for Einstein equations based on Dirac gauge and spherical coordinates
- Waveless Approximation Theories of Gravity
- A relativistic formalism to compute quasi-equilibrium configurations of non-synchronized neutron star binaries
- Gravitational waves from axisymmetric rotating stellar core collapse to a neutron star in full general relativity
- Kadath: a spectral solver for theoretical physics
- A new numerical method for constructing quasi-equilibrium sequences of irrotational binary neutron stars in general relativity
- Deriving formulations for numerical computation of binary neutron stars in quasicircular orbits
- A new public code for initial data of unequal-mass, spinning compact-object binaries
- Irrotational Binary Neutron Stars in Quasiequilibrium in General Relativity
- A relativistic formalism for computation of irrotational binary stars in quasi equilibrium states
- A new numerical method to construct binary neutron star initial data
- Melting Hadrons, Boiling Quarks
- Initial data for binary neutron stars with arbitrary spins
- Modeling differential rotations of compact stars in equilibriums
- Non-conformally flat initial data for binary compact objects
- Binary neutron stars: Equilibrium models beyond spatial conformal flatness
- A new code for equilibriums and quasiequilibrium initial data of compact objects
- Formulation for the internal motion of quasi-equilibrium configurations in general relativity
- Equilibrium solutions of relativistic rotating stars with mixed poloidal and toroidal magnetic fields
- New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields
- Differentially rotating strange star in general relativity
- Numerical method for binary black hole/neutron star initial data: Code test
- Quasi-equilibrium models for triaxially deformed rotating compact stars
- Constant circulation sequences of binary neutron stars and their spin characterization
- Uniformly rotating, axisymmetric and triaxial quark stars in general relativity
- New code for equilibriums and quasiequilibrium initial data of compact objects. II. Convergence tests and comparisons of binary black hole initial data
- Elliptica: a new pseudo-spectral code for the construction of initial data
- Evolution of equal mass binary bare quark stars in full general relativity: could a supramassive merger remnant experience prompt collapse?
- Binary black hole circular orbits computed with COCAL
- Evolution of bare quark stars in full general relativity: Single star case
- NRPyElliptic: A Fast Hyperbolic Relaxation Elliptic Solver for Numerical Relativity, I: Conformally Flat, Binary Puncture Initial Data
- Do triaxial supramassive compact stars exist?
- Complete initial value spacetimes containing black holes in general relativity: Application to black hole-disk systems
- Equilibriums of extremely magnetized compact stars with force-free magnetotunnels