Magnetohydrodynamic Tube Waves: Waves in Fibrils

Abstract

A discussion of waves in magnetic flux tubes imbedded in magnetic unstratified surroundings is given. Seven types of non-leaky wave are identified. Many more leaky waves, tube oscillations which drive waves in the external medium and thereby lose energy to it, are also found. The particular example of longitudinal and transverse oscillations in chromospheric fibrils is examined in detail.