Formation of Helium Lines in Prominences
Acoustic waves (case k = 0 ) -- Important for non-magnetized regions in the low solar atmosphere: Eqs. (10),(6) = (12) Fig. 3: Defined by Eq(12) variation.
Observations Morphology Quantitative properties Underlying Physics Aly-Sturrock limit
Fig.4: Typical values of the collisional and viscous damping time ratios for propagating a) Alfvén and fast magnetoacoustic waves and b) acoustic wave.
