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Massive stars may during their evolution reach the phase of critical rotationwhen the further increase in rotational speed is no longer possible. Theejection of matter in the equatorial region forms the gaseous outflowing disk,which allows the star to remove the excess of its angular momentum. The outerpart of the disk can extend up to large distance from the parent star. We studythe evolution of density, radial and azimuthal velocity and angular momentumloss rate of equatorial decretion disk up to quite distant outer regions. Wecalculate the evolution of density, radial and azimuthal velocity from theinitial Keplerian state until the disk approaches the final stationary state.

Models of extended decretion disks of critically rotating stars