  Recent advances in scanning tunneling spectroscopy performed on heavy-fermion
metals provide a window onto local electronic properties of composite
heavy-electron quasiparticles. Here we theoretically investigate the energy and
temperature evolution of single-particle spectra and their quasiparticle
interference caused by point-like impurities in the framework of a periodic
Anderson model. By numerically solving dynamical-mean-field-theory equations,
we are able to access all temperatures and to capture the crossover from weakly
interacting c and f electrons to fully coherent heavy quasiparticles.
Remarkably, this crossover occurs in a dynamical fashion at an energy-dependent
crossover temperature. We study in detail the associated Fermi-surface
reconstruction and characterize the incoherent regime near the Kondo
temperature. Finally, we link our results to current heavy-fermion experiments.
