Astrophysics and Space Science

, Volume 96, Issue 1, pp 185–194 | Cite as

Period changes of Cepheid variables

I: Secular period changes
  • L. Szabados
Article

Abstract

Secular period changes of one hundred northern Cepheids are investigated with the help of O−C diagrams. With the classical Cepheids the rate of observed period changes is in good agreement with that determined from stellar evolution theory. The period noise cannot mask the evolutionary period changes especially in longer period Cepheids for which the occurrence of parabolic O−C graphs is unusually frequent.

Keywords

Evolution Theory Period Change Evolutionary Period Stellar Evolution Period Noise 

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Copyright information

© D. Reidel Publishing Company 1983

Authors and Affiliations

  • L. Szabados
    • 1
  1. 1.Konkoly Observatory BudapestHungary

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