The Intrinsic Properties of Multiwavelength Energy Spectra for Fermi Teraelectronvolt Blazars

In this paper, we have selected a sample of 64 teraelectronvolt blazars, with redshift, from those classified in the fourth Fermi Large Area Telescope source catalog.(3) We have obtained the values of the relevant physical parameters by performing a log-parabolic fitting of the average-state multiwavelength spectral energy distributions. We estimate the range of the radiation zone parameters, such as the Doppler factor (D), the magnetic field strength (B), the radiative zone radius (R), and the peak Lorentz factor (gamma(p)) of nonthermal electrons. Here, we show that (1) there is a strong linear positive correlation between the intrinsic synchrotron peak frequency and the intrinsic inverse Compton scattering (ICs) peak frequency among different types of blazars; (2) if radio bands are excluded, the spectral index of each band is negatively correlated with the intrinsic peak frequency; (3) there is a strong linear negative correlation between the curvature at the peak and the intrinsic peak frequency of the synchrotron bump, and a weak positive correlation between the curvature at the peak and the intrinsic peak frequency of the ICs bump; (4) there is a strong linear positive correlation between the intrinsic ICs peak luminosity and intrinsic gamma-ray luminosity and between the intrinsic ICs peak frequency and peak Lorentz factor; (5) there is a strong negative linear correlation between log B and log gamma(p); and (6) there is no correlation between log R and log gamma(p).

Automated summary

The study found strong linear relationships among different types of blazars, such as the intrinsic synchrotron peak frequency and the intrinsic inverse Compton scattering peak frequency. The spectral index in each band is negatively correlated with the intrinsic peak frequency. The curvature at the peak of the synchrotron bump is negatively correlated with the intrinsic peak frequency, while it is positively correlated with the intrinsic peak frequency of the ICs bump. There are strong linear positive correlations between the intrinsic ICs peak luminosity and intrinsic gamma-ray luminosity, as well as between the intrinsic ICs peak frequency and peak Lorentz factor. The study also found a strong negative linear correlation between log B and log gamma(p), and no correlation between log R and log gamma(p).