## 5. Simulations of the particle evolutionNow that we know the energy-loss rates of the pairs inside a new jet component, we can follow the evolution of such a pair plasma. In the first phase in which radiative losses are the only really important mechanisms, this can be done most easily by following the cooling of single particles and using the fact that the total particle number is conserved: Let be the cooling rate for one particle. From to the particle energy reduces from to where Particle number conservation implies If we choose small enough so that the
explicit time dependence of This is used to follow the cooling of the injected pair plasma. In each time step, we calculate the emanating photon spectra (see Sect. 6) and use the respective synchrotron and SSC spectra in order to calculate the SSC cooling-rate according to Eq. (32) self-consistently. © European Southern Observatory (ESO) 1997 Online publication: May 26, 1998 |