Estimating the Jet Power from Broadband SED modeling of Mkn 501 for different particle distributions

We consider the broadband spectral energy distribution of the high energy peaked (HBL) blazar Mkn 501 using Swift-XRT/UVOT, NuSTAR and Fermi-LAT observations taken between 2013 and 2022. The spectra were fitted with a one-zone leptonic model using synchrotron and synchrotron self-Compton emission from different particle energy distributions such as a broken power-law, log-parabola, as well as distributions expected when the diffusion or the acceleration time scale are energy dependent. The jet power estimated for a broken power-law distribution was ∼ 10^47 (10^44) erg s^-1 for a minimum electron energy γ_min∼ 10 (10^3). However, for electron energy distributions with intrinsic curvature (such as the log-parabola form), the jet power is significantly lower at a few times 10^42 erg s^-1 which is a few percent of the Eddington luminosity of a 10^7 M_⊙ black hole, suggesting that the jet may be powered by accretion processes. We discuss the implications of these results.