Zobrazeno 1 - 10
of 344
pro vyhledávání: '"Radice, David"'
Autor:
Bernuzzi, Sebastiano, Magistrelli, Fabio, Jacobi, Maximilian, Logoteta, Domenico, Perego, Albino, Radice, David
We present 3D general-relativistic neutrino-radiation hydrodynamics simulations of asymmetric binary neutron star mergers producing long-lived neutron stars remnants and spanning a fraction of their cooling time scale. Two binaries with mass ratios o
Externí odkaz:
http://arxiv.org/abs/2409.18185
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
Quasiperiodic oscillations (QPOs) have been recently discovered in the short gamma-ray bursts (GRBs) 910711 and 931101B. Their frequencies are consistent with those of the radial and quadrupolar oscillations of binary neutron star merger remnants, as
Externí odkaz:
http://arxiv.org/abs/2408.16534
Autor:
Gutiérrez, Eduardo M., Bhattacharya, Mukul, Radice, David, Murase, Kohta, Bernuzzi, Sebastiano
Shock breakout emission is among the first observable signals in a wide variety of astrophysical phenomena, including neutron star (NS) mergers, and it can be the dominant component in low-luminosity short gamma-ray bursts (llsGRBs), as exemplified b
Externí odkaz:
http://arxiv.org/abs/2408.15973
Autor:
Chatziioannou, Katerina, Cromartie, H. Thankful, Gandolfi, Stefano, Tews, Ingo, Radice, David, Steiner, Andrew W., Watts, Anna L.
The past years have witnessed tremendous progress in understanding the properties of neutron stars and of the dense matter in their cores, made possible by electromagnetic observations of neutron stars and the detection of gravitational waves from th
Externí odkaz:
http://arxiv.org/abs/2407.11153
We perform fully general-relativistic simulations of binary strange star mergers considering two different approaches for thermal effects. The first uses a cold equation of state (EOS) derived from a modified version of the MIT bag model which is the
Externí odkaz:
http://arxiv.org/abs/2407.11143
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:
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
Publikováno v:
ApJL 974 L5 (2024)
Understanding the details of $r$-process nucleosynthesis in binary neutron star mergers (BNSM) ejecta is key to interpreting kilonova observations and identifying the role of BNSMs in the origin of heavy elements. We present a self-consistent two-dim
Externí odkaz:
http://arxiv.org/abs/2403.13883