A search for Beta Cephei stars in NGC 6231

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cepheid Variables, Galactic Clusters, Stellar Evolution, Stellar Oscillations, Electrophotometry, Hertzsprung-Russell Diagram, Stellar Luminosity, Stellar Spectrophotometry

Scientific paper

The author presents results of a survey for β Cephei stars in the galactic cluster NGC 6231. Thirty-five stars were monitored for short-period variability through the Johnson B filter. One known β Cep star was confirmed and three more discovered. All have unusually short periods. The implications for the evolutionary status of these stars and for their mechanism of oscillation are discussed.

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