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Superhump evolution of WZ Sge-type dwarf nova ASASSN-14cv at rebrightening stage
Authors:A S Sklyanov  E P Pavlenko  O I Antonyuk  K A Antonyuk  A A Sosnovsky  A I Galeev  N V Pit’  Yu V Babina
Abstract:We report the results of observations of a WZ Sge-type dwarf nova ASASSN-14cv, acquired in 2014 and covering the end of a superoutburst and a rebrightening stage. We detected 8 rebrightenings of this star. Based on the light curve profiles of the rebrightenings, we conclude on the existence of both the “inside-out” and “outside-in” outbursts. During the entire course of the rebrightening stage, a brightness variability with the mean period of P = 0.d06042(8) was detected, which was identified as a superhump period during the stage B of the superoutburst. The character of the registered superhump evolution can be either described by a parabolic approximation with the negative Pdot = ?1.1 × 10?5, or by an approximation with 2 linear areas with the corresponding periods of 0.d06074(3) and 0.d06046(9).
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