Magneto-Acoustic-Gravity Waves

When all three forces act together the behaviour is much more complicated. In general, at high frequencies (ω > ω_BV) the modes are similar to the fast and slow mode magneto-acoustic waves, with the frequency cut-off dependant on the magnetic field. At low frequencies, the gravity mode is cut-off at large k_x by the magnetic field (as in magneto-gravity), and at small k_x by pressure (as in acoustic-gravity waves) (Stein & Leibacher 1974).