Vol 6, No S1

The Formation of Precessional Spiral Density Wave in Accretion Disks and a New Model for Superoutbursts in SU UMa-type Binaries

D. V. Bisikalo, A. A. Boyarchuk, P. V. Kaygorodov, O. A. Kuznetsov, T. Matsuda


Abstract The three-dimensional gas dynamic simulations in SU UMa-type binaries show the formation of the precessional spiral density wave in inner parts of the accretion disk that are not subjected to gas dynamic perturbations. The features of the precessional spiral wave can explain both the energy release in the superoutburst and appearance of a superhump on the orbital light curve.



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