Fig. 15

Evolution of a PN in an eye-shaped AGB-wind bubble, showing the gas density [cgs.] and magnetic field lines at 2000 (left) and 4000 (right) years after the onset of the post-AGB phase. The PN, which starts out spherically (left), starts to feel the influence of the eye-like shape when it encounters the termination shock of the AGB wind (right).
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