TeV gamma-rays from UHECR interactions in AGN cores: Lessons from Centaurus Aстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация: TeV gamma-rays have been observed from blazars as well as from radio galax-
ies like M 87 and Cen A. In leptonic models, gamma-rays above the pair production
threshold can escape from the ultra-relativistic jet, since large Lorentz factors reduce the
background photon densities compared to those required for isotropic emission. Here
we discuss an alternative scenario, where VHE photons are generated as secondaries
from UHECR interactions in the AGN core. We show that TeV gamma-rays can escape
from the core despite large IR and UV backgrounds. For the special case of Cen A, we
study if the various existing observations from the far infra-red to the UHE range can be
reconciled within this picture.