Results of models 1 and 2. Left: evolution of the effective temperature (black curves) and core temperature (red curves) for model 1 (solid curves; our basic model) and model 2 (dotted curves). In the basic model (model 1), the outbursts have an average recurrence time of 0.9 yr, while in model 2 this is 9.0 yr. All other parameters of the two models are the same (including the duration of outbursts). Right: evolution of the photon luminosity (blue) and neutrino luminosity (orange) in model 1 (solid curves) and model 2 (dotted curves).