Japan Geoscience Union Meeting 2016

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

[P-PS11] Planetary Sciences

Wed. May 25, 2016 1:45 PM - 3:15 PM 104 (1F)

Convener:*Keiko Hamano(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Shunichi Kamata(Creative Research Institution, Hokkaido University), Chair:Satoshi Okuzumi(Graduate School of Science, Tokyo Institute of Technology), Hiroshi Kobayashi(Department of Physics, Nagoya University)

2:30 PM - 2:45 PM

[PPS11-04] From planetesimals to planets in turbulent protoplanetary disks

*Hiroshi Kobayashi1, Hidekazu Tanaka2, Satoshi Okuzumi3 (1.Department of Physics, Nagoya University, 2.Tohoku University, 3.Tokyo Institute of Technology)

Keywords:planet formation, planetesimal, turbulence

In turbulent protoplanetary disks, planetesimals are stirred by turbulence, resulting in orderly growth. As planetesiamls grow via collisions, the escape velocities of planetesimals increase and therefore gravitational forcusing becomes important, which ignites runaway growth. The onset of runaway growth modifies the size distribution of planetesimals; the total mass of planetesimals is in the size of planetesimals at the onset of runaway growth. The planetesimal size determines the final mass of planets and the formation timescale. We deribe the size of planetesimals at the onset of runaway growth as a function of the turbulence strength, the surface density of the disk and distance from the host star. Using the result, we discuss constraints on the solar system formation.