Condensation modes in sheared magnetic fields

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Condensation, Magnetohydrodynamic Stability, Solar Magnetic Field, Solar Prominences, Cylindrical Plasmas, Lines Of Force, Magnetic Effects, Plasma Density, Plasma Temperature, Shear Properties

Scientific paper

The present study of the condensation modes in coronal cylindrical plasmas, with attention to magnetic shear effects on stability, notes that such shear is insignificant in the initiation of condensation in the case of low beta coronal plasmas. The effects of magnetic field shear, twist, and strength on condensation modes differ, depending on the wave vector. The stability of condensation modes strongly depends on the choice of equilibrium temperature and density profiles. If plasma temperature increases with twist but density does not, condensation modes are unstable for low field twist; by contrast, if plasma density increases with twist but temperature does not, condensation modes are unstable for high twist.

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