Interpreting the simultaneous variability of near-IR continuum and line   emission in young stellar objects
  We present new near-infrared (IR) spectra (0.80-1.35um) of the pre-Main Sequence source PV Cep taken during a monitoring program of eruptive variables we are conducting since some years. Simultaneous photometric and spectroscopic observations are systematically carried out during outburst and quiescence periods. By correlating extinction-free parameters, such as HI recombination lines and underlying continuum, it is possible to infer on the mechanism(s) responsible for their origin. Accretion and mass loss processes have a dominant role in determining the PV Cep irregular variability of both continuum and line emission. The potentialities of the observational modality are also discussed. 
D. Lorenzetti, S. Antoniucci, T. Giannini, A. Di Paola, A. A.   Arkharov, V. M. Larionov
astro-ph.SR