Modeling of Spiral Structure in a Multi-Component Milky Way-Like Galaxy

Using recent observational data, we construct a set of multi-component equilibrium models the disk Milky Way-like galaxy. The dynamics are studied using collisionless-gaseous numerical simulations, based on joined integration equations motion for collision-less particles direct gravitational interaction and gaseous SPH-particles. We find that after approximately one Gyr, prominent central bar is formed having semi-axis length about three kpc, together with multi-armed spiral pattern represented by superposition m= 2-, 3-, 4-armed spirals. structure exist at least 3 Gyr in our simulations. existence Way imposes limitations density distributions subsystems does not form if radial scale distribution exceeds 2.6 kpc. As expected, formation also suppressed compact massive stellar bulge. demonstrate maximum value rotation curve galaxy, as found its regions, explained non-circular due to presence orientation relative an observer.