On the maximum energy and escape of accelerated particles in young supernova remnants

Using analytic expressions and self-similar solutions, we explore different environments in which supernova remnants (SNRs) evolve, and investigate how the maximum energy to which particles are accelerated, and its time evolution, is a function of the complex environment. We take into account the ambient magnetic field and its amplification by resonant or non-resonant modes. We find that particles reach the maximum energies in the ejecta-dominated stage, much earlier than Sedov stage, particularly in the case of core-collapse SNe expanding in the winds of massive stars.