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Cepheid period changes and stellar evolution

Published online by Cambridge University Press:  04 August 2017

J.D. Fernie
J.D. Fernie*
Affiliation:
David Dunlap Observatory, University of Toronto

Extract

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The question of whether or not the period changes observed in some classical cepheids are due to evolution across the HR diagram remains controversial. On the one hand, it is known that the stars are indeed evolving across the diagram and are therefore changing their radii and must therefore be changing their periods. On the other hand, only a fraction of cepheids appear to have period changes, and some of these seem to be in the form of sudden jumps. Is it then that the evolutionary changes are too small to be detected, and the observed changes due to something else? This note explores the question.

Type
III. BINARITY, PULSATION, ROTATION AND MIXING
Information
Symposium - International Astronomical Union , Volume 105: Observational Tests of the Stellar Evolution Theory , 1984 , pp. 441 - 444
Copyright
Copyright © Reidel 1984 

References

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