Japan Geoscience Union Meeting 2015

Presentation information


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

[P-PS21] Planetary Sciences

Sun. May 24, 2015 2:15 PM - 4:00 PM A02 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Kosuke Kurosawa(Planetary Exploration Research Center, Chiba Institute of Technology), Keiko Hamano(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Chair:Hiroshi Kobayashi(Department of Physics, Nagoya University), Sin-iti Sirono(Department of Earth and Planetary Sciences, Nagoya University)

2:30 PM - 2:45 PM

[PPS21-15] Structure of the accretion disk around a protostar and the planetesimal formation (I)

*Toshikazu EBISUZAKI1, Yusuke IMAEDA1 (1.RIKEN)

Keywords:protoplanetary disk, planetesimal formation, magnetorotational instability

Headean Bioscience has started the budget year 2014 by Kekenhi: Scientific Research on Priority Areas. A05 Life planet group aims to study the formation process of life planets like the Earth.

We constructed a steady state 1-D model of a protoplanetary disk taking into account of the magneto-rotational instability (MRI) and photo-evaporation by the ionizing radiation from the central stars. We found that a quiescent zone appears in 0.5AU-5AU and sandwiched by inner and outer turbulent regions. The column density of the quiescent zone is one order of magnitude higher than the other part of the disk. Two boundaries of quiescent zone is promising sites of the planetesimal formation site accumulating the solid particles.

When accretion rate decease down to 10-8 solar mass per year, the near side of the disk gas will dissipate by the photo-ebvapolation. We will present the research strategy of the A05 Life planet group and major results.