Dynamical models of Early-Type Galaxies with multiple stellar populations

Main Authors: Caravita Caterina, Ciotti Luca, Pellegrini Silvia
Format: Proceeding poster eJournal
Bahasa: eng
Terbitan: , 2019
Subjects:
Online Access: https://zenodo.org/record/3553789
Daftar Isi:
  • We present the analytical and numerical framework developed to model Early-Type Galaxies (ETGs), based on the solutions of the Jeans equations for axisymmetric systems in equilibrium. These models may include an arbitrary number of stellar components, a dark matter halo and a central supermassive black hole. In particular, each stellar component can be characterised by different structural (density profile, flattening, mass, scale length), dynamical (rotation, velocity dispersion anisotropy), and population (age, metallicity, Initial Mass Function, mass-to-light ratio) properties. With a careful choice of the normalisation scales, we reduce at the minimum number the physical parameters entering the code, in order to allow the maximum flessibility in the post-processing tuning and drastically reduce the computational time. Therefore, (i) we upgraded the numerical code JASMINE and (ii) we developed a new code for the post-processing modeling. Some of the interesting fields of applications of our modeling are the study of the effect of different stellar dynamic/kinematic components, IMF variations, mass-to-light ratio gradients on projected luminosity-weighted properties. Moreover these models can be used as test for similar multi-component analytical models and to implement hydrodynamical simulations of ETGs.