Zobrazeno 1 - 10
of 3 479
pro vyhledávání: '"Foucart A"'
Autor:
Cheong, Patrick Chi-Kit, Foucart, Francois, Ng, Harry Ho-Yin, Offermans, Arthur, Duez, Matthew D., Muhammed, Nishad, Chawhan, Pavan
We investigate the influence of inelastic neutrino microphysics in general-relativistic magnetohydrodynamics simulations of a hypermassive neutron star. In particular, we include species/energy groups coupled neutrino-matter interactions, such as ine
Externí odkaz:
http://arxiv.org/abs/2410.20681
Autor:
Foucart, Francois
In this chapter, we provide an overview of the physics of colliding black holes and neutron stars and of the impact of neutrinos on these systems. Observations of colliding neutron stars play an important role in nuclear astrophysics today. They allo
Externí odkaz:
http://arxiv.org/abs/2410.03646
Autor:
Issa, Danat, Gottlieb, Ore, Metzger, Brian, Jacquemin-Ide, Jonatan, Liska, Matthew, Foucart, Francois, Halevi, Goni, Tchekhovskoy, Alexander
Collapsars - rapidly rotating stellar cores that form black holes (BHs) - can power gamma-ray bursts (GRBs) and are proposed to be key contributors to the production of heavy elements in the Universe via the rapid neutron capture process ($r$-process
Externí odkaz:
http://arxiv.org/abs/2410.02852
Autor:
Kneller, James P., Froustey, Julien, Grohs, Evan B., Foucart, Francois, McLaughlin, Gail C., Richers, Sherwood
A computationally efficient method for calculating the transport of neutrino flavor in simulations is to use angular moments of the neutrino one-body reduced density matrix, i.e., `quantum moments'. As with any moment-based radiation transport method
Externí odkaz:
http://arxiv.org/abs/2410.00719
Neutrino flavor instabilities appear to be omnipresent in dense astrophysical environments, thus presenting a challenge to large-scale simulations of core-collapse supernovae and neutron star mergers (NSMs). Subgrid models offer a path forward, but r
Externí odkaz:
http://arxiv.org/abs/2409.04405
Conditioning the logistic continuous-state branching process on non-extinction via its total progeny
The problem of conditioning a continuous-state branching process with quadratic competition (logistic CB process) on non-extinction is investigated. We first establish that non-extinction is equivalent to the total progeny of the population being inf
Externí odkaz:
http://arxiv.org/abs/2408.14993
Autor:
Cheong, Patrick Chi-Kit, Foucart, Francois, Duez, Matthew D., Offermans, Arthur, Muhammed, Nishad, Chawhan, Pavan
We compare two-moment based \emph{energy-dependent} and 3 variants of \emph{energy-integrated} neutrino transport general-relativistic magnetohydrodynamics simulations of hypermassive neutron star. To study the impacts due to the choice of the neutri
Externí odkaz:
http://arxiv.org/abs/2407.16017
Autor:
Foucart, Francois, Cheong, Patrick Chi-Kit, Duez, Matthew D., Kidder, Lawrence E., Pfeiffer, Harald P., Scheel, Mark A.
Binary neutron star mergers play an important role in nuclear astrophysics: their gravitational wave and electromagnetic signals carry information about the equation of state of cold matter above nuclear saturation density, and they may be one of the
Externí odkaz:
http://arxiv.org/abs/2407.15989
Autor:
Deppe, Nils, Foucart, Francois, Bonilla, Marceline S., Boyle, Michael, Corso, Nicholas J., Duez, Matthew D., Giesler, Matthew, Hébert, François, Kidder, Lawrence E., Kim, Yoonsoo, Kumar, Prayush, Legred, Isaac, Lovelace, Geoffrey, Most, Elias R., Moxon, Jordan, Nelli, Kyle C., Pfeiffer, Harald P., Scheel, Mark A., Teukolsky, Saul A., Throwe, William, Vu, Nils L.
We present a discontinuous Galerkin-finite difference hybrid scheme that allows high-order shock capturing with the discontinuous Galerkin method for general relativistic magnetohydrodynamics in dynamical spacetimes. We present several optimizations
Externí odkaz:
http://arxiv.org/abs/2406.19038
Autor:
Foucart, Simon, Hengartner, Nicolas
Inspired by multi-fidelity methods in computer simulations, this article introduces procedures to design surrogates for the input/output relationship of a high-fidelity code. These surrogates should be learned from runs of both the high-fidelity and
Externí odkaz:
http://arxiv.org/abs/2406.14418