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• W4387615493 abstract "We present version 1.0 of our Lagrangian numerical relativity code SPHINCS_BSSN . This code evolves the full set of Einstein equations, but contrary to other numerical relativity codes, it evolves the matter fluid via Lagrangian particles in the framework of a high-accuracy version of smooth particle hydrodynamics (SPH). The major new elements introduced here are: (i) a new method to map the stress–energy tensor (known at the particles) to the spacetime mesh, based on a local regression estimate; (ii) additional measures that ensure the robust evolution of a neutron star through its collapse to a black hole; and (iii) further refinements in how we place the SPH particles for our initial data. The latter are implemented in our code SPHINCS_ID which now, in addition to LORENE , can also couple to initial data produced by the initial data library FUKA . We discuss several simulations of neutron star mergers performed with SPHINCS_BSSN_v1.0 , including irrotational cases with and without prompt collapse and a system where only one of the stars has a large spin (χ = 0.5)." @default.
• W4387615493 created "2023-10-14" @default.
• W4387615493 creator A5002429438 @default.
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• W4387615493 date "2023-10-13" @default.
• W4387615493 modified "2023-10-15" @default.
• W4387615493 title "The Lagrangian numerical relativity code SPHINCS_BSSN_v1.0" @default.
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• W4387615493 doi "https://doi.org/10.3389/fams.2023.1236586" @default.
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