[vsnet-campaign-dn 16004] LL And: stage A superhumps and mass ratio

LL And: stage A superhumps and mass ratio

Kyoto U. team, Crimean Astrophys. Obs. team, Itoh-san, Alexandra Zubareva, Tonny Vanmunster, Tamas Tordai, Filipp Romanov and Kiyota-san have reported observations.

The object started to show well-detectable superhumps since Sep. 20. The current period (stage A) is 0.0579(1) d. This period corresponds to q=0.143(5). This value is consistent with the result in

https://ui.adsabs.harvard.edu/abs/2004PASJ...56S.135K/abstract

This object is likely an SU UMa star (rather than a WZ Sge star) as judged from the mass ratio despite the very long supercycle. The lack of strong early superhumps appears to be consistent with this classification.