The “Galaxy Model” (GalMod) is a theoretical population synthesis model to simulate synthetic surveys of the Milky Way.

When using this model in a published paper please cite Pasetto et al. 2016, MNRAS 461 2383. People involved (directly or indirectly) in the realization of this project are Pasetto S. (PI); Natale, G.; Kawata, D.; Chiosi, C.; Hunt, J. A. S.; Brogliato, C.; Piovan,L.; Tantalo, R.; Cassara, R.. The realization of this project would have not been possible without the fundamental works carried out over more than three decades by Bertelli, G.; Nasi, Vallenari A.; E.; Bressan, A.; Girardi, L.; Marigo, P. and many others.

It assumes the Galaxy to be compounded by a discrete superposition of several composite stellar populations (CSPs) belonging to a few nominal “major” stellar populations: the thin disk, the thick disk, the stellar halo and the bulge. These major stellar populations are assumed to be embedded in a single dark matter halo component and an hot coronal gas component.

A global model for the Milky Way's gravitational potential is built up to secure consistency with the density profiles by solving the Poisson equation. In turn, these density profiles are used to generate synthetic probability distribution functions (PDFs) for the distribution of stars in the color-magnitude diagrams (CMDs). Finally, the gravitational potential is used to constrain the stellar kinematics by means of the moment method on (perturbed)/phase-space distribution functions.

The model contains a description of non-axisymmetric features of the Galaxy such as the spiral arms, bar, photometric extinction and large field of view treatment where the gradients of the underlying stellar distribution are significant.

Please feel free to contact Galaxy.Model@yahoo.com for support, comments or bug repot.

For a detailed description of the model please visit our tutorial