Stability of a flux tube model for prominences
D. Schmitt and
Received 12 May 1998 / Accepted 10 December 1998
We discuss the stability of a flux tube model for quiescent solar prominences. The main result is that the configurations are stable only up to a critical width (defined as the extension of the central part of the flux tube with prominence matter at low temperatures) of about to . The dependence of the critical width on the prominence parameters height, temperature, density contrast, external magnetic field, external gas pressure and external temperature is analysed. The normal modes and eigenfrequencies obtained numerically cover the range of observational data for prominence oscillations.
Key words: instabilities Magnetohydrodynamics (MHD) Sun: filaments Sun: magnetic fields Sun: prominences
Present address: Kiepenheuer-Institut für Sonnenphysik, Schöneckstrasse 6, D-79104 Freiburg, Germany
Correspondence to: M. Rempel (firstname.lastname@example.org)
This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 1999
Online publication: March 1, 1999