论文信息 - ON RUNAWAY GROWTH OF PLANETESIMALS

ON RUNAWAY GROWTH OF PLANETESIMALS

We present the results of three-dimensional N-body simulations of planetary accretion. We confirm that runaway growth is a dominant mode of planetary accretion in a three-dimensional system where orbits of planetesimals have inclinations. In runaway growth, larger planetesimals grow more rapidly than smaller ones and the mass ratio between them increases monotonically. On the other hand, in a two-dimensional system where all orbits are coplanar, we find that runaway growth does not occur. These results are explained by the simple analytical argument.

E. Kokubo | S. Ida

[1] C. Hayashi. Structure of the Solar Nebula, Growth and Decay of Magnetic Fields and Effects of Magnetic and Turbulent Viscosities on the Nebula , 1981 .

[2] S. Aarseth,et al. A numerical simulation of the formation of the terrestrial planets , 1986 .

[3] George W. Wetherill,et al. Accumulation of a swarm of small planetesimals , 1989 .

[4] Junichiro Makino,et al. On a Hermite Integrator with Ahmad-Cohen Scheme for Gravitational Many-Body Problems , 1992 .

[5] Junichiro Makino,et al. N-Body simulation of gravitational interaction between planetesimals and a protoplanet. I : velocity distribution of planetesimals , 1992 .

[6] D. Lin,et al. Evolution of Planetesimals. II. Numerical Simulations , 1993 .

[7] J. Makino,et al. HARP--A Special-Purpose Computer for N-Body Problem (GRAPE) , 1993 .

[8] J. Makino,et al. Scattering of Planetesimals by a Protoplanet: Slowing Down of Runaway Growth , 1993 .

[9] J. Lunine,et al. Protostars and planets III , 1993 .