Simulation of Shock-Shock interaction in parsec-scale jets
  The analysis of the radio light curves of the blazar CTA102 during its 2006
flare revealed a possible interaction between a standing shock wave and a
traveling one. In order to better understand this highly non-linear process, we
used a relativistic hydrodynamic code to simulate the high energy interaction
and its related emission. The calculated synchrotron emission from these
simulations showed an increase in turnover flux density, $S_{m}$, and turnover
frequency, $\nu_{m}$, during the interaction and decrease to its initial values
after the passage of the traveling shock wave.
