Propeller-driven Outflows and Disk Oscillations

Details Propeller-driven Outflows and Disk Oscillations Propeller-driven Outflows and Disk Oscillations

2005-11-20

arxiv.org/abs/astro-ph/0511600v1

Astrophys.J.635:L165-L168,2005

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, see animation in http://www.astro.cornell.edu/us-rus/animation/a_strong.htm

Scientific paper

10.1086/499560

We report the discovery of propeller-driven outflows in axisymmetric magnetohydrodynamic simulations of disk accretion to rapidly rotating magnetized stars. Matter outflows in a wide cone and is centrifugally ejected from the inner regions of the disk. Closer to the axis there is a strong, collimated, magnetically dominated outflow of energy and angular momentum carried by the open magnetic field lines from the star. The ``efficiency'' of the propeller may be very high in the respect that most of the incoming disk matter is expelled from the system in winds. The star spins-down rapidly due to the magnetic interaction with the disk through closed field lines and with corona through open field lines. Diffusive and viscous interaction between magnetosphere and the disk are important: no outflows were observed for very small values of the diffusivity and viscosity. These simulation results are applicable to the early stages of evolution of classical T Tauri stars and to different stages of evolution of cataclysmic variables and neutron stars in binary systems. As an example, we have shown that young rapidly rotating magnetized CTTSs spin-down to their present slow rotation in less than 10^6 years.

Affiliated with

Also associated with

No associations

Rating

Propeller-driven Outflows and Disk Oscillations 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 Propeller-driven Outflows and Disk Oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propeller-driven Outflows and Disk Oscillations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-290703