Cepheid Light Curve

Identify a Cepheid variable star from its light curve and deduce its period

A Cepheid variable is a star that pulses frequently. We see the light they produce dip and rise over a short period of time, returning to the same luminosity a few days later.

Cepheids have a period-luminosity relation. The longer the period between peaks of brightness the brighter the star is.

 

 

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Light Curves Animation Light Curves

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Imagine the Universe Cepheid Variables as Cosmic Yardsticks

Davison E. Soper, University of Oregon Cepheid variable stars as distance indicators