beat Cepheid

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A Cepheid variable that is oscillating in both the fundamental and first overtone pulsation modes; abbr. CEP(B). The periods interact to produce a longer, beat period. Such stars, also known as double-mode Cepheids, account for nearly half of all Cepheids with periods of 2–4 days.

Subjects: Astronomy and Astrophysics.

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