Tailoring triaxial N-body models via a novel made-to-measure method

TL;DR

This paper introduces a new made-to-measure N-body modeling technique that improves upon previous methods, enabling the creation of realistic, tailored dark-matter halo models with specific density, shape, and velocity properties.

Contribution

A novel adaptation method for N-body models that overcomes previous limitations, allowing for precise modeling of triaxial dark-matter haloes with desired characteristics.

Findings

Successfully generated equilibrium models with prescribed density profiles.

Achieved realistic triaxial shapes and velocity anisotropy.

Demonstrated improved flexibility and accuracy over previous methods.

Abstract

The made-to-measure N-body method (Syer & Tremaine 1996) slowly adapts the particle weights of an N-body model, whilst integrating the trajectories in an assumed static potential, until some constraints are satisfied, such as optimal fits to observational data. I propose a novel technique for this adaption procedure, which overcomes several limitations and shortcomings of the original method. The capability of the new technique is demonstrated by generating realistic N-body equilibrium models for dark-matter haloes with prescribed density profile, triaxial shape, and slowly outwardly growing radial velocity anisotropy