CfA OIR Division Lunch Talks
Wednesday, May 22, 2013, 11:00 am, Pratt Conference Room

VHE blazars: observations and modeling

Matteo Cerruti (CfA)

The current generation of atmospheric Cherenkov telescopes has significantly improved our knowledge of active galactic nuclei emitting very-high-energy (VHE; E > 100 GeV) gamma-ray photons. The VHE extra-galactic sky is dominated, in particular, by the class of blazars, even though some radio-galaxies and starburst galaxies have been detected as well. I will present a review of VHE blazar observations, in particular from the VERITAS telescope array. In the second part of the talk I will focus on theoretical modeling of blazar emission. The models developed to explain the blazar spectral energy distributions (SEDs) can be divided in two big families, leptonic and hadronic models. While in the first scenario the emission is dominated by electrons and positrons, in the latter the gamma-ray flux is associated with protons in the emitting region. I will discuss both families of models, with applications to some interesting sources.