Zobrazeno 1 - 10
of 26
pro vyhledávání: '"VASSET, NICOLAS"'
Publikováno v:
In Energy 1 November 2023 282
Publikováno v:
In Energy 1 August 2022 252
An excision scheme for black holes in constrained evolution formulations: spherically symmetric case
Publikováno v:
Phys. Rev. D 90, 044062 (2014)
Excision techniques are used in order to deal with black holes in numerical simulations of Einstein equations and consist in removing a topological sphere containing the physical singularity from the numerical domain, applying instead appropriate bou
Externí odkaz:
http://arxiv.org/abs/1306.5976
Autor:
Berninger, Heiko, Frenod, Emmanuel, Gander, Martin, Liebendörfer, Mathias, Michaud, Jérôme, Vasset, Nicolas
In this paper we give an introduction to the Boltzmann equation for neutrino transport used in core collapse supernova models as well as a detailed mathematical description of the \emph{Isotropic Diffusion Source Approximation} (IDSA). Furthermore, w
Externí odkaz:
http://arxiv.org/abs/1211.6901
Autor:
Winteler, Christian, Kaeppeli, Roger, Perego, Albino, Arcones, Almudena, Vasset, Nicolas, Nishimura, Nobuya, Liebendoerfer, Matthias, Thielemann, Friedrich-Karl
Publikováno v:
2012 ApJ 750 L22
We examine magnetorotationally driven supernovae as sources of $r$-process elements in the early Galaxy. On the basis of thermodynamic histories of tracer particles from a three-dimensional magnetohydrodynamical core-collapse supernova model with app
Externí odkaz:
http://arxiv.org/abs/1203.0616
We present a numerical method for handling the resolution of a general transport equation for radiative particles, aimed at physical problems with a general spherical geometry. Having in mind the computational time difficulties encountered in problem
Externí odkaz:
http://arxiv.org/abs/1104.5330
Publikováno v:
AIP Conf.Proc.1122:308-311,2009
Non-continuous "jumps" of Apparent Horizons occur generically in 3+1 (binary) black hole evolutions. The dynamical trapping horizon framework suggests a spacetime picture in which these "Apparent Horizon jumps" are understood as spatial cuts of a sin
Externí odkaz:
http://arxiv.org/abs/1103.6180
Using a constrained formalism for Einstein equations in Dirac gauge, we propose to compute excised quasistationary initial data for black hole spacetimes in full general relativity. Vacuum spacetime settings are numerically constructed by using the i
Externí odkaz:
http://arxiv.org/abs/1002.4720
Publikováno v:
J.Comput.Phys.229:399-414,2010
The wave equation for vectors and symmetric tensors in spherical coordinates is studied under the divergence-free constraint. We describe a numerical method, based on the spectral decomposition of vector/tensor components onto spherical harmonics, th
Externí odkaz:
http://arxiv.org/abs/0905.2048
Publikováno v:
Phys.Rev.D79:124010,2009
We present a numerical work aiming at the computation of excised initial data for black hole spacetimes in full general relativity, using Dirac gauge in the context of a constrained formalism for the Einstein equations. Introducing the isolated horiz
Externí odkaz:
http://arxiv.org/abs/0901.2052