Speaker
Dr
Stefano Vercellone
(Istituto Nazionale di Astrofisica (INAF))
Description
High-redshift ($z > 2$) blazars have spectral energy distributions whose inverse Compton peak usually lies in the MeV-GeV energy range. In particular, the AGILE satellite investigated 4C $+$71.07 and PKS 1830$-$211 triggering multi-wavelengths observations from the radio to the gamma-ray energy bands, in response to gamma-ray flares. We report on the multi-wavelength observations, discussing the modelling of their spectral energy distributions, whose extreme Compton dominance ($>100$ during the flares) may challenge the canonical one-component emission model, requiring alternative models. Moreover, their high-redshifts make them excellent candidates for future gamma-ray missions such as COSI and e-ASTROGAM.
Primary author
Dr
Stefano Vercellone
(Istituto Nazionale di Astrofisica (INAF))
