Understanding the photometric variability of ζ Ori Aa

B. Buysschaert, C. Neiner, T. Ramiaramanantsoa +3

We studied the variability of the magnetic O-type supergiant $\zeta$ Ori Aa using multi-colour BRITE photometry. We confirmed the known rotation frequency $f_{\mathrm{rot}}=0.15\pm 0.02$…