Rate of Period Change as a Diagnostic of Cepheid Properties

Details Rate of Period Change as a Diagnostic of Cepheid Properties Rate of Period Change as a Diagnostic of Cepheid Properties

2006-01-30

arxiv.org/abs/astro-ph/0601687v2

Publ.Astron.Soc.Pac.118:410-418,2006

Astronomy and Astrophysics

Astrophysics

Published in PASP (March 2006); TeX source & figures now provided

Scientific paper

10.1086/499501

Rate of period change $\dot{P}$ for a Cepheid is shown to be a parameter that is capable of indicating the instability strip crossing mode for individual objects, and, in conjunction with light amplitude, likely location within the instability strip. Observed rates of period change in over 200 Milky Way Cepheids are demonstrated to be in general agreement with predictions from stellar evolutionary models, although the sample also displays features that are inconsistent with some published models and indicative of the importance of additional factors not fully incorporated in models to date.

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