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Implications of White-Dwarf Crystallization for the Chemical Composition of the Planetary Nuclei

Published online by Cambridge University Press:  14 August 2015

H.M. Van Horn
H.M. Van Horn*
Affiliation:
Dept. of Physics and Astronomy, University of Rochester, U.S.A.

Extract

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It now seems to be reasonably well-established that the central stars of planetary nebulae evolve directly into white dwarfs. Evidently a knowledge of the chemical composition of the white dwarfs would therefore be of considerable importance in helping to identify the point in the evolution at which the mechanism responsible for expulsion of the nebular shell becomes operative. For this reason I would like to present some evidence which provides a direct suggestion for the internal composition of some of the white dwarfs and to examine briefly the implications of this suggestion for the relation between the planetary nuclei and the white dwarfs.

Type
Session VI – Origin and Evolution
Information
Symposium - International Astronomical Union , Volume 34: Planetary Nebulae , 1968 , pp. 425 - 427
Copyright
Copyright © Reidel 1968 

References

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