57 citations · 503 across the 25 of their papers we have counts for
8 papers · 1 filter
Energy ejection in the collapse of a cold spherical self-gravitating cloud
M. Joyce, B. Marcos, F. Sylos Labini
When an open system of classical point particles interacting by Newtonian gravity collapses and relaxes violently, an arbitrary amount of energy may in principle be carried away by…
Towards quantitative control on discreteness error in the non-linear regime of cosmological N body simulations
Michael Joyce, Bruno Marcos, Thierry Baertschiger
The effects of discreteness arising from the use of the N-body method on the accuracy of simulations of cosmological structure formation are not currently well understood. After a…
Particle linear theory on a self-gravitating perturbed cubic Bravais lattice
B. Marcos
Discreteness effects are a source of uncontrolled systematic errors of N-body simulations, which are used to compute the evolution of a self-gravitating fluid. We have already deve…
Quantification of discreteness effects in cosmological N-body simulations: II. Evolution up to shell crossing
Michael Joyce, Bruno Marcos
We apply a recently developed perturbative formalism which describes the evolution under their self-gravity of particles displaced from a perfect lattice to quantify precisely, up…
Linear perturbative theory of the discrete cosmological N-body problem
B. Marcos, T. Baertschiger, M. Joyce +2
We present a perturbative treatment of the evolution under their mutual self-gravity of particles displaced off an infinite perfect lattice, both for a static space and for a homog…
Gravitational evolution of a perturbed lattice and its fluid limit
M. Joyce, B. Marcos, A. Gabrielli +2
We apply a simple linearization, well known in solid state physics, to approximate the evolution at early times of cosmological N-body simulations of gravity. In the limit that the…
A method of generating initial conditions for cosmological N body simulations
M. Joyce, D. Levesque, B. Marcos
We investigate the possibility of generating initial conditions for cosmological N-body simulations by simulating a system whose correlations at thermal equilibrium approximate wel…
Quantification of discreteness effects in cosmological N-body simulations: I. Initial Conditions
Michael Joyce, Bruno Marcos
The relation between the results of cosmological N-body simulations, and the continuum theoretical models they simulate, is currently not understood in a way which allows a quantif…