49 citations · 293 across the 32 of their papers we have counts for
33 papers
Dynamical friction vs. subhalo heating in Cold Dark Matter haloes
Jorge Peñarrubia, Pierfrancesco Di Cintio, Eduardo Vitral +1
The orbital evolution of massive stellar systems embedded in dark matter haloes is governed by competing processes. Dynamical friction removes orbital energy, whereas fluctuations…
On an empirical method to build near-equilibrium axisymmetric and triaxial galaxy models
Pierfrancesco Di Cintio, Alessandro Alberto Trani, Valentina Cesare
We introduce a numerical technique to implement body realizations of axisymmetric and triaxial self-gravitating system starting from a spherical self-consistent models for whic…
The stability of radially anisotropic rotating stellar systems with a central density cusp
Pierfrancesco Di Cintio, Anna Lisa Varri
We investigate the interplay between radial velocity anisotropy and internal rotation in self-gravitating systems characterised by initial spherical symmetry and a moderate density…
Generalized flux-weighted boundary walls in kinetic models
Luca Barbieri, Pierfrancesco Di Cintio
We present a technique to investigate the stationary states of a system of a collisionless system confined by an external potential and coupled to boundary reservoirs through presc…
Beyond the Largest Lyapunov Exponent: Entropy-Based Diagnostics of Chaos in Henon-Heiles and N-Body Dynamics
Alessandro Alberto Trani, Pierfrancesco Di Cintio, Michele Ginolfi
The largest Lyapunov exponent is widely used to diagnose chaos in gravitational dynamics, but in mixed phase spaces and finite-N systems it does not always provide a complete descr…
Tidal mass loss in the Fornax dwarf spheroidal galaxy through N-body simulations with Gaia DR3-based orbits
Pierfrancesco Di Cintio, Giuliano Iorio, Francesco Calura +2
The Fornax dwarf spheroidal galaxy (dSph) represents a challenge for some globular cluster (GC) formation models, because an exceptionally high fraction of its stellar mass is lock…
Dynamical friction in the quasi-linear formulation of modified Newtonian dynamics (QuMOND)
Pierfrancesco Di Cintio, Federico Re, Caterina Chiari
Aims. We explore the dynamical friction on a test mass in gravitational systems in the Quasi linear formulation of Modified Newtonian Dynamics (QuMOND). Methods. Exploiting the qua…
Sharpening the dark matter signature in gravitational waveforms II: Numerical simulations with the NbodyIMRI code
Bradley J. Kavanagh, Theophanes K. Karydas, Gianfranco Bertone +2
Future gravitational wave observatories can probe dark matter by detecting the dephasing in the waveform of binary black hole mergers induced by dark matter overdensities. Such a d…
Temperature inversion in a confined plasma atmosphere: coarse-grained effect of temperature fluctuations at its base
Luca Barbieri, Emanuele Papini, Pierfrancesco Di Cintio +3
Prompted by the relevant problem of temperature inversion (i.e. gradient of density anti-correlated to the gradient of temperature) in astrophysics, we introduce a novel method to…
Dissipationless collapse and the dynamical mass-ellipticity relation of elliptical galaxies in Newtonian gravity and MOND
Pierfrancesco Di Cintio
Context. Deur (2014) and Winters et al. (2023) proposed an empirical relation between the dark to total mass ratio and ellipticity in elliptical galaxies from their observed total…
Structure of the equivalent Newtonian systems in MOND N-body simulations. Density profiles and the core-cusp problem
Federico Re, Pierfrancesco Di Cintio
We investigate the core-cusp problem of the cold dark matter (CDM) scenario in the context of Modified Newtonian Dynamics (MOND) paradigm exploiting the concept of equivalen…
Dynamics of intermediate mass black holes in globular clusters. Wander radius and anisotropy profiles
Pierfrancesco Di Cintio, Mario Pasquato, Luca Barbieri +2
We recently introduced a new method for simulating collisional gravitational N-body systems with approximately linear time scaling with , based on the Multi-Particle Collision (…
Relativistic dynamical friction in stellar systems
Caterina Chiari, Pierfrancesco Di Cintio
We extend the classical formulation of the dynamical friction effect on a test star by Chandrasekhar to the case of relativistic velocities and velocity distributions also accounti…
Modified Thirring model beyond the excluded-volume approximation
Alessandro Campa, Lapo Casetti, Pierfrancesco Di Cintio +3
Long-range interacting systems may exhibit ensemble inequivalence and can possibly attain equilibrium states under completely open conditions, for which energy, volume and number o…
Multiparticle collision simulations of dense stellar systems and plasmas
P. Di Cintio, M. Pasquato, L. Barbieri +13
We summarize a series of numerical experiments of collisional dynamics in dense stellar systems such as globular clusters (GCs) and in weakly collisional plasmas using a novel simu…
Symplectic coarse graining approach to the dynamics of spherical self-gravitating systems
Luca Barbieri, Pierfrancesco Di Cintio, Guido Giachetti +2
We investigate the evolution of the phase-space distribution function around slightly perturbed stationary states and the process of violent relaxation in the context of the dissip…
Noise, friction and the radial-orbit instability in anisotropic stellar systems: stochastic N-body simulations
Pierfrancesco Di Cintio, Lapo Casetti
By means of numerical simulations we study the radial-orbit instability in anisotropic self-gravitating body systems under the effect of noise. We find that the presence of add…
Introducing a new multi-particle collision method for the evolution of dense stellar systems II. Core collapse
Pierfrancesco Di Cintio, Mario Pasquato, Alicia Simon-Petit +1
In a previous paper we introduced a new method for simulating collisional gravitational -body systems with linear time scaling on , based on the Multi-Particle Collision (MPC…
Introducing a new multi-particle collision method for the evolution of dense stellar systems. Crash-test N-body simulations
Pierfrancesco Di Cintio, Mario Pasquato, Hyunwoo Kim +1
Stellar systems are broadly divided into collisional and non-collisional. The latter are large-N systems with long relaxation timescales and can be simulated disregarding two-body…
Collisional relaxation and dynamical scaling in multiparticle collisions dynamics
Stefano Lepri, Hugo Bufferand, Guido Ciraolo +3
We present the Multi-Particle-Collision (MPC) dynamics approach to simulate properties of low-dimensional systems. In particular, we illustrate the method for a simple model: a one…
Fluid and kinetic modelling for non-local heat transport in magnetic fusion devices
Guido Ciraolo, Hugo Bufferand, Pierfrancesco Di Cintio +7
In order to improve the presently used ad hoc flux limiter treatment of parallel heat flux transport in edge plasma fluid codes we consider here a generalized version of the Fourie…
Heat transport in oscillator chains with long-range interactions coupled to thermal reservoirs
Stefano Iubini, Pierfrancesco Di Cintio, Stefano Lepri +2
We investigate thermal conduction in arrays of long-range interacting rotors and Fermi-Pasta-Ulam (FPU) oscillators coupled to two reservoirs at different temperatures. The strengt…
Radially anisotropic systems with forces. II: radial-orbit instability
Pierfrancesco Di Cintio, Luca Ciotti, Carlo Nipoti
We continue to investigate the dynamics of collisionless systems of particles interacting via additive interparticle forces. Here we focus on the dependence of the radial-…
Multi-particle collision simulations of 2D one-component plasmas: anomalous transport and dimensional crossovers
Pierfrancesco Di Cintio, Roberto Livi, Stefano Lepri +1
By means of hybrid multi-particle collsion--particle-in-cell (MPC-PIC) simulations we study the dynamical scaling of energy and density correlations at equilibrium in moderately co…