Long-Term Evolution of a Dipolar-Type Magnetosphere Interacting with an Accretion Disk

Details Long-Term Evolution of a Dipolar-Type Magnetosphere Interacting with an Accretion Disk Long-Term Evolution of a Dipolar-Type Magnetosphere Interacting with an Accretion Disk

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ptep.proc..111f&link_type=abstract

Plasma Turbulence and Energetic Particles in Astrophysics, Proceedings of the International Conference, Cracow (Poland), 5-10 Se

Astronomy and Astrophysics

Astrophysics

Scientific paper

The evolution of a stellar dipolar-type magnetosphere interacting with a Keplerian disk is investigated numerically using the ideal MHD ZEUS-3D code in the axisymmetry option. Depending mainly on the magnetic field strength, our simulations last several hundred Keplerian periods of the inner disk. The main result is that the dipolar structure of the magnetic field almost completely disappears. An expanding bubble of hot gas of low density forms disrupting the initial dipolar field structure. A disk wind accelerates within the time limit of the simulation to velocities of about 0.5 the Keplerian speed and potentially may develop into a stationary collimated jet.

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