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Evolutionary Changes in the Periods of Cepheids

Published online by Cambridge University Press:  12 April 2016

L. N. Berdnikov
Affiliation:
Sternberg Astronomical Institute, 13 Universitetskij pr., Moscow 119899, Russia
V. V. Ignatova
Affiliation:
Tashkent University and Astronomical Institute, 33 Astronomicheskaya st., Tashkent 700052, Uzbekistan

Abstract

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Our analysis of O – C diagrams for 230 (mainly northern) Cepheids revealed that periods of 67 of them show evolutionary changes. New parabolic elements for these Cepheids are presented.

Type
Part 3. Cepheids, RR Lyrae Stars, Distance Scales
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Berdnikov, L.N. 1992, Sov. Astr. Lett., 18, 207 Google Scholar