Discovery of KSP-OT-202104a, a new WZ Sge-type dwarf nova with P_sh ≈ 71.7 min likely below the period minimum and evolving toward AM CVn.
On the origin of tilted disks and negative superhumps
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abstract
The origin of tilted disks in cataclysmic variables is explained in terms of a model involving the stream-disk interactions. Tilted, precessing disk causes periodically variable asymmetry in the irradiation of the two hemispheres of the secondary component, resulting in variable vertical component of the velocity of the stream. The following stream-disk interactions provide additional vertical acceleration to disk elements needed to produce and maintain disk tilt. Predictions based on this model compare favorably with observations.
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A New WZ Sagittae-type Dwarf Nova KSP-OT-202104a Near the Period Minimum from the KMTNet Supernova Program
Discovery of KSP-OT-202104a, a new WZ Sge-type dwarf nova with P_sh ≈ 71.7 min likely below the period minimum and evolving toward AM CVn.