Fig. 22

Thickness growth of M 31 with time in the simulation of the encounter. The thickness is displayed normalized to the thickness of M 31 in the simulation in isolation. The disk height was defined as enclosing either 25, 50, or 75% of the particles in the vertical direction. Only particles close to the solar radius (8.5 kpc) were considered in the calculation. The dashed line marks the instant of the closest approach of MW and M 31.
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