Magnetically-Driven Winds from Protostellar Disks

Details Magnetically-Driven Winds from Protostellar Disks Magnetically-Driven Winds from Protostellar Disks

1997-07-21

arxiv.org/abs/astro-ph/9707228v2

IAU Colloq 163, Accretion Phenomena and Related Outflows, ed. D. Wickramasinghe, L. Ferrario and G. Bicknell, (ASP: San Franci

Astronomy and Astrophysics

Astrophysics

Fixed bad postscript in fig 1. 4 pages, 2 eps figures, uses paspconf.sty and epsf.sty, Proc. IAU Colloq. 163, Accretion Phenom

Scientific paper

Angular momentum transport in protostellar disks can be achieved by the action of a large scale magnetic field that runs vertically through the disk. The magnetic field centrifugally drives material from the disk surfaces into a wind, initiating a bipolar outflow. One apparent difficulty for this model is that the conductivity of the disk is extremely low in the inner 0.1--10 AU of the disk, where grains are the dominant charge carriers. Near the midplane, charged grains are unable to drift through the neutral gas and there is negligible coupling between the magnetic field and the disk material. However, the removal of angular momentum and acceleration of a wind by a magnetic field can still take place in the surface layers of the disk where the gas conductivity increases dramatically. Solutions to the multifluid MHD equations for the vertical structure of a disk at a particular radius are presented. Most of the disk material sits in hydrostatic equilibrium and does not interact with the magnetic field running vertically through it. Near the disk surfaces, the coupling between the magnetic field and disk material is sufficient to initiate an outflow from the disk surface.

Affiliated with

Also associated with

No associations

Rating

Magnetically-Driven Winds from Protostellar 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 Magnetically-Driven Winds from Protostellar Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically-Driven Winds from Protostellar Disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-158263