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The Evidence for Planetary Progenitor Rotation and for the Long Term Acceleration of the Ejected Nebular Shell

Published online by Cambridge University Press:  12 April 2016

Ronald C. Kirkpatrick
Ronald C. Kirkpatrick*
Affiliation:
Los Alamos Scientific Laboratory

Abstract:

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Several theories seek to explain the peculiar shapes of planetary nebulae. Those of Louise, Kirkpatrick, and Phillips and Reay rely on progenitor rotation. The velocity-radius relation for the shells of well observed planetaries do not extrapolate back through the origin, but rather fall short, suggesting that the shell acquires its velocity over a significant period of time. Kirkpatrick’s theory relies heavily on long term acceleration of the nebular shell, and other theoretical studies support the idea of acceleration of the nebular shell up to the time it becomes optically thin to the ionizing radiation from the central star.

Type
VI. Red Variables
Information
International Astronomical Union Colloquium , Volume 58: Stellar Hydrodynamics , August 1980 , pp. 467 - 472
Copyright
Copyright © Reidel 1980

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