摘要：Context. Information on the origin of internetwork magnetic field is
hidden at the smallest spatial scales.
Aims. We try to retrieve the power spectra with certainty to the highest
spatial frequencies allowed by current instrumentation.
Methods. To accomplish this, we use a 2D inversion code that is able to
recover information up to the instrumental diffraction limit.
Results. The retrieved power spectra have shallow slopes that extend
further down to much smaller scales than has been found before. They do not seem to show
any power law. The observed slopes at subgranular scales agree with those obtained from
recent local dynamo simulations. Small differences are found for the vertical component of
kinetic energy that suggest that observations suffer from an instrumental effect that is
not taken into account.
Conclusions. Local dynamo simulations quantitatively reproduce the
observed magnetic energy power spectra on the scales of granulation down to the resolution
limit of Hinode/SP, within the error bars inflicted by the method used and the
instrumental effects replicated.
关键词：Sun: granulation;Sun: photosphere;Sun: magnetic fields
