Stability of a flux tube model for prominences

Citation
M. Rempel et al., Stability of a flux tube model for prominences, ASTRON ASTR, 343(2), 1999, pp. 615-623
Citations number
42
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
343
Issue
2
Year of publication
1999
Pages
615 - 623
Database
ISI
SICI code
0004-6361(199903)343:2<615:SOAFTM>2.0.ZU;2-0
Abstract
We discuss the stability of a flux tube model for quiescent solar prominenc es. The main result is that the configurations are stable only up to a crit ical width (defined as the extension of the central part of the flux tube w ith prominence matter at low temperatures) of about 1 000 km to 3 000 km. T he dependence of the critical width on the prominence parameters height, te mperature, density contrast, external magnetic field, external gas pressure and external temperature is analysed. The normal modes and eigenfrequencie s obtained numerically cover the range of observational data for prominence oscillations.