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pro vyhledávání: '"Radice"'
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
In this paper, we study the existence and the summability of solutions to a Robin boundary value problem whose prototype is the following: $$ \begin{cases} -\text{div}(b(|u|)\nabla u)=f &\text{in }\Omega,\\[.2cm] \displaystyle\frac{\partial u}{\parti
Externí odkaz:
http://arxiv.org/abs/2407.10607
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
Understanding the details of $r$-process nucleosynthesis in binary neutron star mergers (BNSMs) ejecta is key to interpret kilonovae observations and to identify the role of BNSMs in the origin of heavy elements. We present a self-consistent 2-dimens
Externí odkaz:
http://arxiv.org/abs/2403.13883
Autor:
Radice, Mattia, Cristadoro, Giampaolo
Publikováno v:
Phys. Rev. E 110, L022103 (2024)
We consider a one-dimensional search process under stochastic resetting conditions. A target is located at $b\geq0$ and a searcher, starting from the origin, performs a discrete-time random walk with independent jumps drawn from a heavy-tailed distri
Externí odkaz:
http://arxiv.org/abs/2403.12727
Autor:
Radice, David, Hawke, Ian
Observations of neutron star mergers have the potential to unveil detailed physics of matter and gravity in regimes inaccessible by other experiments. Quantitative comparisons to theory and parameter estimation require nonlinear numerical simulations
Externí odkaz:
http://arxiv.org/abs/2402.03224