On the Period Doubling Behaviour of Three W Vir Stars

Emese Plachy, Gábor B. Kovács and Emese Forgács-Dajka

We examined archive data of W Vir type stars to search and study period doubling behaviour. We discovered that W Vir, the eponym of the group, and SZ Mon both show interchanging events in the order of the deep and shallow minima during the past decades. We also demonstrate that ST Pup, known for its strong period change, also exhibited a period doubling episode.

Proceedings of the Polish Astronomical Society, vol. 6, 310-311 (2018)

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