We have completed an exhaustive study of the
onset of nonaxisymmetric instabilities in geometrically
thick, self-gravitating protostellar disks (Woodward, Tohline
& Hachisu 1994). An animation sequence illustrating one of the
simulations from this study is available in formats indicated in
the caption to the "Movie Icon" shown here. The movie illustrates
the nonlinear development of the "Papaloizou-Pringle" instability
in a massless disk. Through simulations of this type
we have been able to demonstrate that our nonlinear
simulations produce nonaxisymmetric growth rates that match
the predictions of linear theory (Papaloizou and Pringle 1984;
Frank and Robertson 1988; Kojima 1986;
Andalib et al. 1997) to very high precision.
- Andalib, S. W., Tohline, J. E., and Christodoulou, D. M. 1997, ApJ, 108, 471.
- Frank, J., and Robertson, J. A. 1988, M.N.R.A.S., 232, 1.
- Kojima, Y. 1986, Prog. Theor. Phys. 75, 251.
- Papaloizou, J. C. B., and Pringle, J. E. 1984, M. N. R. A. S., 208, 721.
- Woodward, J. W., Tohline, J. E., and Hachisu, I. 1994, ApJ, 420, 247.
Joel E. Tohline
John E. Cazes
Howard S. Cohl
John E. Cazes
John W. Woodward
This work has been supported, in part, by the U.S. National Science
Foundation through grant
and, in part, by grants of
high-performance-computing time at the
San Diego Supercomputer Center
and through the
of the NAVOCEANO DoD Major Shared Resource Center in Stennis, MS.