Physics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..161s&link_type=abstract
EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V
Physics
Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Magnetohydrodynamics And Plasmas, Infall, Accretion, And Accretion Disks
Scientific paper
We investigate the role of disk winds in the dispersal of protoplanetary disks. First, we study the disk winds driven by magnetorotational turbulence by using local 3D MHD simulations. The breakup of large-scale channel flows, which develop most effectively around 1.5-2 times the disk scale height, drive highly time-dependent disk winds by transporting Poynting flux. The channel flows that are breaking up also excite magnetosonic and Alfvénic waves toward the midplanes, which possibly contribute to the sedimentation of small dust grains. Next, we investigate the global evolution of disks by applying the results of the local simulations. The disk winds play an essential role in the dynamical evaporation of disks, especially in the inner regions because the mass flux is proportional to the inverse of the dynamical timescale. Therefore, the dispersal takes place in an inside-out manner, which may explain the properties of transitional disks.
Inutsuka Shu-ichiro
Suzuki Takeru K.
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