Dynamical models of spheroidal multi-component stellar systems

TL;DR

This paper introduces an advanced numerical code, JASMINE, capable of modeling complex axisymmetric stellar systems with multiple components, enabling detailed analysis of galaxy structures and stellar populations.

Contribution

The paper presents a significantly improved version of JASMINE that solves Jeans equations for multi-component axisymmetric stellar systems with diverse properties.

Findings

Enhanced modeling of stellar systems with multiple populations.

Ability to incorporate dark matter halos and central black holes.

Framework applicable to various galaxy types.

Abstract

We present a significantly improved version of our numerical code JASMINE, that can now solve the Jeans equations for axisymmetric models of stellar systems, composed of an arbitrary number of stellar populations, a Dark Matter halo, and a central Black Hole. The stellar components can have different structural (density profile, flattening, mass, scale length), dynamical (rotational support, velocity dispersion anisotropy), and population (age, metallicity, Initial Mass Function, mass-to-light ratio) properties. These models, when combined with observations, will allow to investigate important issues, such as quantifying the systematic effects of IMF variations, of mass-to-light ratio gradients, and of different stellar kinematic components (e.g. counter rotating disks, kinematically decoupled cores) on luminosity-weighted properties. The developed analytical and numerical framework aims at modeling Early-Type Galaxies, but it can also be applied to dwarf Spheroidal galaxies and Globular Clusters.