The role of the f-mode in the relation between solar intensity oscillations and granulation

A series of white-light images is used to examine the relation of solar intensity oscillations and the granulation structure. Much of the oscillation power lies on the f-mode ridge in the diagnostic diagram. Filters are constructed to separate granulation, p-modes, and the f-mode. The filtered data are used to investigate the relation between rms-amplitudes of the oscillations and the granulation structure. Both p-modes and f-mode show a tendency to increased amplitudes in the darkest features of the granulation structure, with the f-mode showing this preference for dark regions much clearer. We emphasize that due to the different propagation characteristics of p-modes and the f-mode a separation like ours is mandatory to draw conclusions about wave excitation and diffraction.