184 citations · 415 across the 6 of their papers we have counts for
6 papers
A combined radio and GeV gamma-ray view of the 2012 and 2013 flares of Mrk 421
T. Hovatta, M. Petropoulou, J. L. Richards +8
In 2012 Markarian 421 underwent the largest flare ever observed in this blazar at radio frequencies. In the present study, we start exploring this unique event and compare it to a…
Photohadronic origin of -ray BL Lac emission: implications for IceCube neutrinos
Maria Petropoulou, Stavros Dimitrakoudis, Paolo Padovani +2
The recent IceCube discovery of 0.1-1 PeV neutrinos of astrophysical origin opens up a new era for high-energy astrophysics. Although there are various astrophysical candidate sour…
Bethe-Heitler emission in BL Lacs: filling the gap between X-rays and -rays
M. Petropoulou, A. Mastichiadis
We present the spectral signatures of the Bethe-Heitler pair production () process on the spectral energy distribution (SED) of blazars, in scenarios where the hard -ray emi…
Hadronic supercriticality as a trigger for GRB emission
Maria Petropoulou, Stavros Dimitrakoudis, Apostolos Mastichiadis +1
We explore a one-zone hadronic model that may be able to reproduce -ray burst (GRB) prompt emission with a minimum of free parameters. Assuming only that GRBs are efficient high…
The role of hadronic cascades in GRB models of efficient neutrino production
Maria Petropoulou
We investigate the effects of hadronic cascades on the gamma-ray burst (GRB) prompt emission spectra in scenarios of efficient neutrino production. By assuming a fiducial GRB spect…
Implications of a PeV neutrino spectral cutoff in GRB models
Maria Petropoulou, Dimitrios Giannios, Stavros Dimitrakoudis
The recent discovery of extragalactic PeV neutrinos opens a new window to the exploration of cosmic-ray accelerators. The observed PeV neutrino flux is close to the Waxman-Bahcall…