We observed the dwarf nova system GOTO065054. 49+593624. 51 (hereafter GOTO0650), and classified its rebrightening behavior as type E and type B (type E means double superoutburst and type B means multiple rebrightenings). Based on the O-C analysis of superhump maxima, we estimated its mass ratio and orbital period as q = 0. 073 (9) and P₎ₑ₁ = 0. 0625 (2) d, respectively. These values support the idea that GOTO0650 may follow the standard evolutionary path of cataclysmic variables. However, this object showed an unusually large number of rebrightenings (11 events) and a prolonged active phase of approximately 100 days. To investigate the rebrightening models of systems with multiple rebrightening outbursts including GOTO0650, we conducted a statistical survey from the perspective of the average outburst cycle of rebrightening, defined as the time per rebrightening Tᵣeb (d). Many of type B objects are in the range of 5 Tᵣeb9, suggesting that physical rebrightening mechanism may be common to type B objects. The Tᵣeb of GOTO0650 is 8. 89 d. GOTO0650 is within the normal range in terms of Tᵣeb, so physical mechanisms may be common to at least type B objects and GOTO0650. There are two proposed models of the mechanism of rebrightening, the mass reservoir model and the enhanced mass transfer model. From prior research, Tₑ₄₁ might be linked to binary parameters such as a mass ratio. We examined whether there was any correlation between Tᵣeb and parameters based on the two models. Both parameters based on the two models exhibited a correlation with Tᵣeb. However, no significant differences were found between the correlations derived from the two models.
Hoke et al. (Fri,) studied this question.