Abstract
A model of blazar emission is presented wherein the spectrum from radio to VHE γ-rays is produced by synchrotron and inverse Compton emission from a population of ultra-relativistic electrons. Acceleration of the electrons happens within the broad line region, and inverse Compton cooling on broad line photons can play a dominant role in limiting the maximum energy that the electrons can attain. The division of blazars into high and low synchrotron peaked objects can be explained in this scheme, with the low peaked objects having greater inverse Compton cooling, correlating with the higher γ-ray luminosity and stronger broad line emission seen in those objects. The light curves of blazar flares in this model have a distinctive signature in γ-rays, where the light curve is independent of γ-ray energy and the duration of a flare in inverse Compton radiation is shorter than the corresponding flare in synchrotron emission.
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