On an empirical method to build near-equilibrium axisymmetric and triaxial galaxy models
Pierfrancesco Di Cintio, Alessandro Alberto Trani, Valentina Cesare
astro-ph.GA
Submitted: 2026-07-31
Comments: 16 pages, 7 figures, submitted. Comments welcome
License: http://creativecommons.org/licenses/by/4.0/
The gist: We introduce a numerical technique to implement N- body realizations of axisymmetric and triaxial self-gravitating system starting from a spherical self-consistent models for which a phase-space
Terminology
Abstract
We introduce a numerical technique to implement N- body realizations of axisymmetric and triaxial self-gravitating system starting from a spherical self-consistent models for which a phase-space distribution is known. The method is an improvement of the so-called adiabatic squeezing technique and allows one to have a better control of the effective ellipticities of the particle distribution and produces virialized systems that can be used as non-spherical initial conditions for N- body simulations. Some numerical stability tests are presented and discussed.
Sources
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- A simple method to construct exact density-potential pairs from a homeoidal expansion
- Self-consistent models of cuspy triaxial galaxies with dark matter haloes
- Relaxation of N-body systems with additive r^-{\alpha} interparticle forces
- A Very Fast and Momentum-Conserving Tree Code
- The Evolution of Cuspy Triaxial Galaxies Harboring Central Black Holes
- Models of Cuspy Triaxial Galaxies
- Anisotropic distribution functions for spherical galaxies
- Supermassive Black Hole Binaries as Galactic Blenders
- A parallel implementation of a new fast algorithm for N-body simulations
- Triaxial Galaxies with Cusps
- Dissipationless collapse, weak homology and central cores of elliptical galaxies
- Noise-Induced Phase Space Transport in Two-Dimensional Hamiltonian Systems
- Dynamical Modeling of Galaxies and Supermassive Black Holes: Axisymmetry in Triaxial Schwarzschild Orbit Superposition Models
- Chaos in violent relaxation dynamics. Disentangling micro- and macro-chaos in numerical experiments of dissipationless collapse
- Turbulent drag on stellar mass black holes embedded in disks of active galactic nuclei
- Beyond the Largest Lyapunov Exponent: Entropy-Based Diagnostics of Chaos in Henon-Heiles and N-Body Dynamics
- Realistic triaxial density--potential--force profiles for stellar systems and dark matter halos
- A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
- Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
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