Y.X.Jane Yap (NTHU); Albert Kong (NTHU); Kinwah Wu (UCL/MSSL)
Blazar jets are among the most powerful astrophysical objects in the Universe, however their internal microphysics and the exact role of relativistic electrons and protons inside these jets remains unsettled. While electrons cool efficiently through their radiative emission (in our case, synchrotron and synchrotron-self-compton processes are considered) their kinetic power in a leptonic jet is usually smaller than the observed luminosity of a powerful blazar. Protons, on the other hand, have longer cooling timescales and often could provide sufficient energy reservoir compared to observations. In this work, we explore the role of both relativistic leptons and hadrons in blazar jets, through modelling their multi-wavelength emission. We consider their gamma-ray and X-ray emission, and compare with observations of selected blazar classes.