Using the SED to locate the Gamma-ray emission site of powerful blazars

Details Using the SED to locate the Gamma-ray emission site of powerful blazars Using the SED to locate the Gamma-ray emission site of powerful blazars

2012-02-28

arxiv.org/abs/1202.6193v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

2012 Fermi & Jansky Proceedings - eConf C111110

Scientific paper

The location of the Gamma-ray emission of powerful blazars is a matter of active debate. Is the location within the UV emitting sub-pc scale broad line region, or farther out at pc scales where the molecular torus IR emission dominates? We present a diagnostic that connects three observables, the synchrotron and external Compton peak frequencies and the Compton dominance (the ratio of Compton to synchrotron luminosity) to the seed photon energy and energy density. We discuss encouraging preliminary results and discuss how to use our diagnostic to understand the location of the Gamma-ray emission as a function of source power through the use of multiwavelength observations.

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