Linear Current Instability in Loop Prominences

Details Linear Current Instability in Loop Prominences Linear Current Instability in Loop Prominences

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..158...71t&link_type=abstract

Solar Physics, Volume 158, Issue 1, pp.71-80

Physics

3

Scientific paper

By use of the dispersion equation given by Song, Wu, and Dryer (1987) for a cylinder plasma with mass motion and gravity included, we investigate the linear current instabilities developed in loop prominences. The results indicate that the mode of linear instability depends mainly on whetherv {/s 2} > Φ or not, wherev s is the sonic velocity at heightz, Φ =GM/(R +z) is the gravity potential,G the gravitational constant,M andR the mass and the radius of the Sun respectively. Ifv {/s 2} > Φ, then the sausage instability will be dominant. Otherwise, the kink instability will be more important. A possible explanation of ‘knot’ structure, which appears sometimes in solar loop prominences has been given.

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