Difficulties in planetary formation theories revisited in light of ALMA observations

Tetsuo Hasegawa

Presentation information

[J] Poster

P (Space and Planetary Sciences ) » P-CG Complex & General

[P-CG26] New Developments of Planetary Sciences with ALMA

convener:Tetsuo Hasegawa(National Astronomical Observatory of Japan, National Institutes of Natural Sciences), Takayuki Muto(Division of Liberal Arts, Kogakuin University), Takahiro IINO(Information Technology Center, the University of Tokyo), Masumi Shimojo(National Astronomical Observatory of Japan)

[PCG26-P01] Difficulties in planetary formation theories revisited in light of ALMA observations

*Tetsuo Hasegawa¹ (1.National Astronomical Observatory of Japan, National Institutes of Natural Sciences)

Keywords:protoplanetary disk, ALMA

ALMA has revolutionarized the study of planetary system formation by providing unprecedented images of protoplanetary disks, the sites of planet formation, at the spatial resolution as good as a few au. On the other hand, some basic difficulties have been recognized in the theories of planet formation. In this paper, we review new observational information from ALMA in this context, and examine whether the new observations give clues to the solution of the difficulties such as; 1) dust growth and planetesimal formation (dust infall problem, turbulence in the disk), 2) migration of planets (planet infall problem).