A Recurrence Time versus Orbital Period Relation for the Z Camelopardalis Stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Accretion, Accretion Disks, Stars: Binaries: Close, Stars: Individual: Constellation Name: Rx Andromedae, Stars: Individual (Kt Persei), Stars: Individual: Constellation Name: Tz Persei, Stars: Individual (Am Cassiopeiae), Stars: Individual (Sv Canis Minoris), Stars: Individual: Constellation Name: Z Camelopardalis, Stars: Individual (At Cancri), Stars: Individual: Constellation Name: Sy Cancri, Stars: Individual: Constellation Name: Ah Herculis, Stars: Individual (Em Cygni), Stars: Individual (Ab Draconis)

Scientific paper

We examine AAVSO (American Association of Variable Star Observers) light curves of 16 Z Camelopardalis systems with measured orbital periods, with particular focus on intervals away from standstill. During these times, most of the systems display a sawtooth-like outburst behavior, with quiescent intervals comparable to the outburst durations. We report the discovery of a linear relation between the characteristic outburst period and orbital period for these systems, which is given by =62.0(+/-7.7)Porb(days)+2.41(+/-1.87).

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