A possible change in pulsation mode of the R Corona Borealis star, S Apodis

Astronomy and Astrophysics – Astronomy

Scientific paper

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Carbon Stars, Corona Borealis Constellation, Light Curve, Stellar Oscillations, Harmonic Oscillation, Stellar Evolution

Scientific paper

The small amplitude variations in the light curve of S Apodis, usually attributed to pulsation of the star, have in the past shown a periodicity of about 120 days. Visual observations by New Zealand astronomers indicate that a period near 40 days has developed. This may be due to a change from the fundamental mode of pulsation to an overtone.

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