Surface Brightness Fluctuations: a theoretical point of view
  We present new theoretical evaluations of optical and near-IR Surface Brightness Fluctuations (SBF) magnitudes for single-burst stellar populations in the age range t=5-15 Gyr and metallicity from $Z_{\sun}/200$ to $2Z_{\sun}$. Our theoretical predictions can be successfully used to derive reliable distance evaluations. They also appear to be a new and valuable tool to trace the properties of unresolved stellar populations. 
M. Cantiello (1,2), G. Raimondo (1,3), E. Brocato (1), M. Capaccioli   (4)((1) INAF-Osservatorio Astronomico di Collurania, ...