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Hydromagnetic stability analysis of a Solar prominence suspended in an external horizontal magnetic field
Author(s) -
GalindoTrejo J.
Publication year - 1998
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2123190608
Subject(s) - solar prominence , physics , magnetohydrodynamics , magnetic field , plasma , stability (learning theory) , coronal loop , solar physics , mechanics , classical mechanics , astrophysics , coronal mass ejection , computational physics , solar wind , quantum mechanics , machine learning , computer science
Among the observed characteristics of quiescent solar prominences, stability is perhaps the most important requirement for theoretical models of these coronal structures. Only stable equilibria can explain the presence of such cool and dense plasma sheets for extended periods of time. Utilizing the MHD‐Energy Principle (Bernstein et al. 1958) we investigate the linear stability properties of the two‐dimensional prominence equilibrium of Osherovich (1985). Incorporating a finite magnetic energy and a continous magnetic field, this model takes into account explicitly an external horizontal magnetic field in which the prominence is suspended. The presented numerical calculations indicate that the prominence model of Osherovich is stable and can explain the main features of reported oscillations. Instabilities occur only when model parameters are unrealistic for physical conditions in solar prominences.