The “Galaxy Model” (GalMod) is a theoretical population synthesis model able to simulate synthetic surveys of the Milky Way, M31, and able to generate initial conditions for quasi-equilibrium collisionless models. Please refer to Pasetto et al. 2016, 2018a,b for a complete description of the model.
P.I. of the project is Pasetto S.. People involved (directly or indirectly) in the realization of this project are: Brogliato C.; Busso, G.; Cassarà, L.; Chiosi, C.; Crnojevic, D.; Fuchs, B.; Grebel, E.; Hunt, J. A. S.; Just, A.; Kawata, D.; Kollmeier, J.; Natale, G.; Piovan, L.; Tantalo, R.; Zeidler P. The realization of this project would not have been possible without the major work carried out over more than three decades by Bertelli, G.; Nasi, Vallenari A.; E.; Bressan, A.; Girardi, L.; Marigo, P. and many others.
GalMod assumes the Galaxy to be a discrete superposition of several composite stellar populations (CSPs) representing a few nominal significant stellar populations: the thin disk, the thick disk, the stellar halo and the bulge. GalMod immerses these CSPs in a single dark matter (DM) halo component and a hot coronal gas component (HCG). A parametric model for the modeled galaxy gravitational potential is computed to secure consistency with the density profiles by solving the Poisson equation. These density profiles are used to generate synthetic Hertzsprung-Russell and color-magnitude diagrams (CMDs) in several photometric bands. Finally, the gravitational potential is used to realize the stellar kinematics.
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 allocation of stars in the color-magnitude diagrams (CMDs). Finally, the gravitational potential is used to constrain the stellar kinematics using the moment method on phase-space distribution functions.
GalMod contains non-axisymmetric Galactic components such as the spiral arms, bar, and photometric extinction. The realization of the f.o.v has no size limit, even full-sky synthetic surveys are possible.
Please feel free to contact Galaxy.Model@yahoo.com for support, comments or bug report.
For a detailed description of the model please visit our tutorial