Fig. 2

Density distribution by colour at time t = 58 000 s. The coloured arrows represent the three-velocity at different locations (β = v/c). The axes units are a = 8 × 1010 cm. The density units are ρ0 = 22.5 × 10-22 g cm-3. The pulsar and the star are located at (r,z) = (0,5 a) and (r,z) = (0,60 a), respectively. The same units are used in all the figures.
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