Momentum transport from current-driven reconnection in astrophysical disks

Details Momentum transport from current-driven reconnection in astrophysical disks Momentum transport from current-driven reconnection in astrophysical disks

2011-09-27

arxiv.org/abs/1109.5763v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

14 figures; Accepted for publication in ApJ

Scientific paper

Current-driven reconnection is investigated as a possible mechanism for angular momentum transport in astrophysical disks. A theoretical and computational study of angular momentum transport from current-driven magnetohydrodynamic instabilities is performed. It is found that both a single resistive tearing instability and an ideal instability can transport momentum in the presence of azimuthal Keplerian flow. The structure of the Maxwell stress is examined for a single mode through analytic quasilinear theory and computation. Full nonlinear multiple mode computation shows that a global Maxwell stress causes significant momentum transport.

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