Speaker
Dr
Andreas Zech
(LUTH, Observatoire de Paris)
Description
The emerging class of extreme blazars, characterised by very hard high-energy
spectra peaking around TeV energies, pose a challenge for the usual blazar emission
models. While the multi-wavelength emission from high-frequency BL Lac type
blazars can in generally be well interpreted with the single-zone SSC model, the
very hard spectra of extreme blazars (or “ultra-high frequency peaked BL Lac
objects”) push the model parameters to the limits of what is considered as
physically acceptable.
I will attempt to provide an overview over the leptonic and (lepto-)hadronic scenarios
that are currently being proposed to interpret the observed emission from these objects
without depending on parameters that are too extreme.
Primary author
Dr
Andreas Zech
(LUTH, Observatoire de Paris)
