Variability of the extreme PCygni star HDE 326823.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Stars: Supergiants, Stars: Wolf-Rayet, Stars: Individual: Hde326823, Stars: Variable

Scientific paper

On the basis of uvby and visual photometry, and spectrography in the optical region collected over a time span of 10 years, we report large amplitude photometric and spectroscopic variations, and the onset of a sudden brightening event in the system of the extreme supergiant HDE 326823. The event fits the picture that the H-deficient N-rich star is on its way towards becoming a WN star.

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