Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Daszuta, Boris"'
Autor:
Fields, Jacob, Zhu, Hengrui, Radice, David, Stone, James M., Cook, William, Bernuzzi, Sebastiano, Daszuta, Boris
We introduce an extension to the AthenaK code for general-relativistic magnetohydrodynamics (GRMHD) in dynamical spacetimes using a 3+1 conservative Eulerian formulation. Like the fixed-spacetime GRMHD solver, we use standard finite-volume methods to
Externí odkaz:
http://arxiv.org/abs/2409.10384
Autor:
Zhu, Hengrui, Fields, Jacob, Zappa, Francesco, Radice, David, Stone, James, Rashti, Alireza, Cook, William, Bernuzzi, Sebastiano, Daszuta, Boris
We present the numerical relativity module within AthenaK, an open source performance-portable astrophysics code designed for exascale computing applications. This module employs the Z4c formulation to solve the Einstein equations. We demonstrate its
Externí odkaz:
http://arxiv.org/abs/2409.10383
Autor:
Daszuta, Boris, Cook, William, Hammond, Peter, Fields, Jacob, Gutiérrez, Eduardo M., Bernuzzi, Sebastiano, Radice, David
Given the compact binary evolution problem of numerical relativity, in the finite-difference, block-based, adaptive mesh refinement context, choices must be made on how evolved fields are to be discretized. In GR-Athena++, the space-time solver was p
Externí odkaz:
http://arxiv.org/abs/2406.09139
Autor:
Daszuta, Boris, Cook, William
We present a self-contained overview of GR-Athena++, a general-relativistic magnetohydrodynamics (GRMHD) code, that incorporates treatment of dynamical space-time, based on the recent work of (Daszuta+, 2021)[49] and (Cook+, 2023)[45]. General aspect
Externí odkaz:
http://arxiv.org/abs/2406.05126
Autor:
Albanesi, Simone, Rashti, Alireza, Zappa, Francesco, Gamba, Rossella, Cook, William, Daszuta, Boris, Bernuzzi, Sebastiano, Nagar, Alessandro, Radice, David
We study initially unbound systems of two black holes using numerical relativity (NR) simulations performed with GR-Athena++. We focus on regions of the parameter space close to the transition from scatterings to dynamical captures, considering equal
Externí odkaz:
http://arxiv.org/abs/2405.20398
Autor:
Rashti, Alireza, Bhattacharyya, Maitraya, Radice, David, Daszuta, Boris, Cook, William, Bernuzzi, Sebastiano
Publikováno v:
Class. Quantum Grav. 41 095001 (2024)
We discuss refinement criteria for the Berger-Rigoutsos (block-based) refinement algorithm in our numerical relativity code GR-Athena++ in the context of binary black hole merger simulations. We compare three different strategies: the "box-in-box" ap
Externí odkaz:
http://arxiv.org/abs/2312.05438
Autor:
Cook, William, Daszuta, Boris, Fields, Jacob, Hammond, Peter, Albanesi, Simone, Zappa, Francesco, Bernuzzi, Sebastiano, Radice, David
We present the extension of GR-Athena++ to general-relativistic magnetohydrodynamics (GRMHD) for applications to neutron star spacetimes. The new solver couples the constrained transport implementation of Athena++ to the Z4c formulation of the Einste
Externí odkaz:
http://arxiv.org/abs/2311.04989
Autor:
Andrade, Tomas, Trenado, Juan, Albanesi, Simone, Gamba, Rossella, Bernuzzi, Sebastiano, Nagar, Alessandro, Calderon-Bustillo, Juan, Sanchis-Gual, Nicolas, Font, Jose A., Cook, William, Daszuta, Boris, Zappa, Francesco, Radice, David
Dynamical captures of black holes may take place in dense stellar media due to the emission of gravitational radiation during a close passage. Detection of such events requires detailed modelling, since their phenomenology qualitatively differs from
Externí odkaz:
http://arxiv.org/abs/2307.08697
Autor:
Daszuta, Boris
Compact finite-difference (FD) schemes specify derivative approximations implicitly, thus to achieve parallelism with domain-decomposition suitable partitioning of linear systems is required. Consistent order of accuracy, dispersion, and dissipation
Externí odkaz:
http://arxiv.org/abs/2302.14858
Autor:
Daszuta, Boris
Publikováno v:
In Journal of Computational Physics 1 July 2024 508