The physical properties of $Fermi$-4LAC flat spectrum radio quasars.

摘要: In this work, we collect quasi-simultaneous infrared, optical, X-ray and $\gamma$-ray data of 60 $Fermi$-4LAC flat spectrum radio quasars (FSRQs). the framework conventional one-zone leptonic model, investigate physical properties FSRQs' jets by modeling their spectral energy distributions (SEDs). Our main results are summarized as follows. (1) There is a linear correlation between synchrotron peak frequency curvature electron distribution. As suggested previous works, slope best fitting equation consistent with statistic acceleration which needs fluctuation fractional gain. (2) The gamma-ray dissipation regions located at range from 0.1 to 10 pc away super-massive black hole, outside broad-line region (BLR) within dusty torus (DT). (3) A size relation $P_{\rm e}$ (the kinetic power carried in relativistic electrons) $\sim$ B}$ (Poynting flux) $\leq$ r}$ radiative ) $<$ p}$ cold protons) found our modeling. Among them, e}\sim P_{\rm suggests that SEDs almost all FSRQs parameters close equipartition magnetic field electrons. e} < suggest most electrons dissipated EC radiation for FSRQs. (4) an anti-correlation ($\gamma_{\rm peak}$) jet ($P_{\rm jet}$), blazar sequence.