The structure of cool accretion disks in semidetached binaries |
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Authors: | D V Bisikalo A A Boyarchuk P V Kaigorodov O A Kuznetsov T Matsuda |
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Institution: | (1) Institute of Astronomy, Moscow, Russia;(2) Keldysh Institute of Applied Mathematics, Moscow, Russia;(3) Kobe University, Kobe, Japan |
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Abstract: | We present a qualitative analysis of possible changes in the structure of accretion disks that occur in the transition from hot to cool disks. We suggest that an additional spiral-density wave can exist in the inner parts of the disk, where gas-dynamical perturbations are negligible. We consider the formation of this wave and its parameters. The results of a three-dimensional gas-dynamical simulation of a cool accretion disk are presented; these results confirm the possibility of the formation of a new, “precessional,” spiral wave in the inner regions of a cool accretion disk. Possible observational manifestations of such a wave are discussed. |
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