Stability of siphon flow in coronal magnetic loops

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Plasma siphon flow with velocities up to 100 km/s have been observed in coronal magnetic loops. We discuss the stability of this siphon flow using slab and cylinder models. We calculate numerically the dispersion relation and obtain the rate of growth of instability and the frequency of perturbing waves. Our main conclusions are that magnetic field is a stabilizing factor and that flow velocity is a de-stabilizing factor. We discuss the question whether stationary, high-velocity siphon flow can exist in coronal magnetic loops.

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