Japan Geoscience Union Meeting 2014

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Oral

Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS21_29PM1] Planetary Sciences

Tue. Apr 29, 2014 2:15 PM - 4:00 PM 416 (4F)

Convener:*Satoshi Okuzumi(Graduate School of Science, Tokyo Institute of Technology), Kosuke Kurosawa(Planetary Exploration Research Center, Chiba Institute of Technology), Chair:Hiroshi Kobayashi(Department of Physics, Nagoya University), Hidenori Genda(Earth-Life Sicence Institute, Tokyo Institute of Technology)

2:45 PM - 3:00 PM

[PPS21-16] Planetesimal size and protoplanetary disk turbulence

*Hiroshi KOBAYASHI1, Hidekazu TANAKA2, Satoshi OKUZUMI3 (1.Nagoya University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Tokyo Institute of Technology)

Keywords:Planetesimal, Protoplanetary disk, Asteroids, The size distribution of bodies, Planet formation

When the random velocities of bodies are greater than their surface escape velocities, the runaway growth of bodies occurs, which produces a single large bodies surrounded by leftover bodies in each annual of a protoplanetary disk. The slope of the size distribution of bodies becomes steeper through runaway growth. The slope of runaway growth is seen in the size distribution of 100km sized or larger bodies in the main belt. Since the random velocities rises by turbulent stirring in the disk, the planetesimal size above which runaway growth occurs is determined by the strength of turbulence. We discuss turbulence strength in the solar nebula.