Modeling of this violent collision shows that it has formed most of the galaxy's (metal-rich) galactic halo, including the Giant Stream, and also the extended thick disk, the young age thin disk, and the static 10 kpc ring. During this epoch, its rate of star formation would have been very high, to the point of becoming a luminous infrared galaxy for roughly 100 million years. Modeling also recovers the bulge profile, the large bar, and the overall halo density profile.
Modeling of this violent collision shows that it has formed most of the galaxy's (metal-rich) galactic halo, including the Giant Stream, and also the extended thick disk, the young age thin disk, and the static 10 kpc ring. During this epoch, its rate of star formation would have been very high, to the point of becoming a luminous infrared galaxy for roughly 100 million years. Modeling also recovers the bulge profile the large bar, and the overall halo density profile.