POSTER PAPER 3.09
Angular Momentum Transport Between a T Tauri Star and an Accretion Disk
G. Barnes, K.B. MacGregor
Institute: High Altitude Observatory, National Center for Atmospheric Research
Contact Email: barnesg@hao.ucar.edu
Abstract:
We present results from time dependent numerical simulations of the
hydromagnetic interaction between a rotating T Tauri star and a magnetically
coupled Keplerian accretion disk. For a diffusive disk, we find that most
of the toroidal component of the magnetic field is generated within a thin,
shearing boundary layer that forms along the interface between the disk
and the magnetosphere. We describe the properties of the system when
it has attained a rotational equilibrium state in which the stellar
spin-up produced by accretion and structural changes is compensated
for by the spin-down torque arising from the magnetic connection
between the star and the disk.
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Manuscript submitted: 2001-Sep-17
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.