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Paper: On the Velocity Structure in Clumpy Planetary Nebulae
Volume: 313, Asymmetrical Planetary Nebulae III
Page: 230
Authors: Steffen, W.; Lopez, J.A.
Abstract: We study the interaction of a fast tenuous stellar wind with a spherical distribution of high-density clouds embedded in a stationary intercloud medium with an approximately inverse square density fall-off. We calculate the acceleration of the clouds by the stellar wind as a function of distance and density. We find a stratification of velocity with density, which in the long run produces the Hubble-law type linear velocity gradients seen in some planetary nebulae.
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