A hydrodynamical study of multiple-shell planetary nebulae. II. Measuring the post-shock velocities in the shells
Context: Planetary Nebulae (PNe) display complex radial surface brightness profiles whose understanding is crucial for a correct interpretation of their formation and evolution. In particular, the intermediate shells commonly observed around the bright rims of PNe contain important information for the discussion of the mass loss rate at the end of
Corradi, R. L. M. et al.
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2007