Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-04
Astronomy and Astrophysics
Astrophysics
6 pages, 5 figures embedded, ApJL in press
Scientific paper
By performing local three-dimensional MHD simulations of stratified accretion disks, we investigate disk winds driven by MHD turbulence. Initially given weak vertical magnetic fields are effectively amplified by magnetorotational instability and winding due to differential rotation. Large scale channel flows develop most effectively at 1.5 - 2 times the scale heights where the magnetic pressure is comparable to but slightly smaller than the gas pressure. The breakup of these channel flows drives structured disk winds by transporting the Poynting flux to the gas. These features are universally observed in the simulations of various initial fields. This disk wind process should play an essential role in the dynamical evaporation of proto-planetary disks. The breakup of channel flows also excites the momentum fluxes associated with Alfvenic and (magneto-)sonic waves toward the mid-plane, which possibly contribute to the sedimentation of small dust grains in protoplanetary disks.
Inutsuka Shu-ichiro
Suzuki Takeru K.
No associations
LandOfFree
Disk Winds Driven by Magnetorotational Instability and Dispersal of Proto-Planetary Disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Disk Winds Driven by Magnetorotational Instability and Dispersal of Proto-Planetary Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk Winds Driven by Magnetorotational Instability and Dispersal of Proto-Planetary Disks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-135499