Resistive ballooning modes in line-tied coronal arcades

Details Resistive ballooning modes in line-tied coronal arcades Resistive ballooning modes in line-tied coronal arcades

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nascp2442..461v&link_type=abstract

In NASA. Goddard Space Flight Center Coronal and Prominence Plasmas p 461-463 (SEE N87-20871 13-92)

Mathematics

Ballooning Modes, Magnetic Fields, Magnetohydrodynamic Stability, Mathematical Models, Solar Corona, Flow Velocity, Linear Equations, Pressure Gradients, Topology, Vectors (Mathematics)

Scientific paper

The equations describing the linear evolution of resistive ballooning modes are obtained by using a modified WKB expansion in the short perpendicular wavelength, while variations of the perturbations along the field are described by a slowly varying amplitude, on which the tying boundary conditions are imposed. In general, given an equilibrium, there are certain ranges of magnetic surfaces for which the system predicts instability even without dissipation. The main conclusion is that within the resistive MHD approximation cylindrically symmetric arcades with pressure falling with radius are unstable to resistive localized modes; the growth rates, close to ideal marginal stability, are large, so that it would appear that energy could be released during 10 to 100 Alfven times. The wavelength of the modes is expected to be limited by the ion gyroradius, when stabilizing drift effects must be taken into account. The nonlinear evolution of resistive ballooning modes should be studied to assess their overall relevance to the violent and rapidly evolving phenomena observed on the sun.

Affiliated with

Also associated with

No associations

Rating

Resistive ballooning modes in line-tied coronal arcades does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Resistive ballooning modes in line-tied coronal arcades, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resistive ballooning modes in line-tied coronal arcades will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1126932