  The dynamic response of dipole skyrmions in Fe/Gd multilayer films is
investigated by ferromagnetic resonance measurements and compared to
micromagnetic simulations. We detail thickness and temperature dependent
studies of the observed modes as well as the effects of magnetic field history
on the resonant spectra. Correlation between the modes and the magnetic phase
maps constructed from real-space imaging and scattering patterns allows us to
conclude the resonant modes arise from local topological features such as
dipole skyrmions but does not depend on the collective response of a closed
packed lattice of these chiral textures. Using, micromagnetic modeling, we are
able to quantitatively reproduce our experimental observations which suggests
the existence of localized spin-wave modes that are dependent on the helicity
of the dipole skyrmion. We identify four localized spin wave excitations for
the skyrmions that are excited under either in-plane or out-of-plane r.f.
fields. Lastly we show that dipole skyrmions and non-chiral bubble domains
exhibit qualitatively different localized spin wave modes.
