[vsnet-alert 20814] OV Boo: early superhumps

Keisuke Isogai isogai at kusastro.kyoto-u.ac.jp
Fri Mar 24 00:49:10 JST 2017

OV Boo: early superhumps

     Crimean Astrophys. Obs. team (Sosnovskij and Pvalenko), Enrique de Miguel,
Domenico Licchelli, Itoh-san and Kyoto U. team have reported new observations.
     The object was 13.5 V on Mar. 23. Although the early superhumps has been
somewhat weakened, the early superhump has continued. To detect stage A
superhumps, continuous observations are encouraged.
     Stage A superhumps, which means growing phase of ordinary superhumps,
is one of the most important target. It is considered that the period of the
stage A reflects the dynamical precession rate at the 3:1 resonance radius,
and help us to understand behavior of accretion disks. By using the period
of stage A, we can estimate the mass ratio of the system and can confirm the
result of the previous study (Patterson et al. 2008).

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