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Hadronic X-ray Flares from Blazars
Apostolos Mastichiadis, Maria Petropoulou
The detection of a high-energy neutrino from the flaring blazar TXS 0506+056 and the subsequent discovery of a neutrino excess from the same direction have strengthened the hypothe…
Comprehensive Multimessenger Modeling of the Extreme Blazar 3HSP J095507.9+355101 and Predictions for IceCube
Maria Petropoulou, Foteini Oikonomou, Apostolos Mastichiadis +4
3HSP J095507.9+355101 is an extreme blazar which has been possibly associated with a high-energy neutrino (IceCube-200107A) detected one day before the blazar was found to undergo…
A roadmap to hadronic supercriticalities: a comprehensive study of the parameter space for high-energy astrophysical sources
Apostolos Mastichiadis, Ioulia Florou, Elina Kefala +2
Hadronic supercriticalities are radiative instabilities that appear when large amounts of energy are stored in relativistic protons. When the proton energy density exceeds some cri…
The Onset of Hadronic Supercriticality in Expanding Sources
Ioulia Florou, Apostolos Mastichiadis
An overlooked property of hadronic models is that they can become supercritical by abruptly transforming the energy stored in the relativistic protons into radiation. Supercritical…