<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dimitrakoudis, Stavros</style></author><author><style face="normal" font="default" size="100%">Petropoulou, Maria</style></author><author><style face="normal" font="default" size="100%">Mastichiadis, Apostolos</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Self-consistent neutrino and UHE cosmic ray spectra from Mrk 421</style></title><short-title><style face="normal" font="default" size="100%">Astroparticle Physics</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">active galactic nuclei</style></keyword><keyword><style  face="normal" font="default" size="100%">Astrophysics - High Energy Astrophysical Phenomena</style></keyword><keyword><style  face="normal" font="default" size="100%">Gamma ray emission</style></keyword><keyword><style  face="normal" font="default" size="100%">Photo hadronic interactions</style></keyword><keyword><style  face="normal" font="default" size="100%">radiation mechanisms: non-thermal</style></keyword><keyword><style  face="normal" font="default" size="100%">Sources of extraterrestrial neutrinos</style></keyword><keyword><style  face="normal" font="default" size="100%">Ultrahigh energy cosmic rays</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014/02/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://ui.adsabs.harvard.edu/abs/2014APh....54...61D</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">54</style></volume><pages><style face="normal" font="default" size="100%">61 - 66</style></pages><isbn><style face="normal" font="default" size="100%">0927-6505</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We examine the neutrino and cosmic ray spectra resulting from two models of fitting the spectral energy distribution (SED) of the blazar Mrk 421 using a self-consistent leptohadronic code. The γ -ray emission is attributed to either synchrotron radiation of ultra-high energy protons (LHs model) or to synchrotron radiation from electrons that result from photopion interactions of lower energy protons (LH π model). Although both models succeed in fitting satisfactorily the SED, the parameter values that they use result in significantly different neutrino and cosmic-ray spectra. For the LH π model, which requires high proton energy density, we find that the neutrino spectrum peaks at an energy E&lt;SUB&gt;ν,peak&lt;/SUB&gt; = 3.3 PeV which falls well within the energy range of recent neutrino observations. While at the same time its peak flux is just under the sensitivity limit of IC-40 observations, it cannot produce ultra-high energy cosmic rays. In the LHs model, on the other hand, neutrinos are far from being detectable because of their low flux and peak energy at E&lt;SUB&gt;ν,peak&lt;/SUB&gt; ≃ 100 PeV. However, the propagation of protons produced by the decay of escaping neutrons results in an ultra-high energy cosmic ray flux close to that observed by Pierre Augere, HiRes and Telescope Array at energies E&lt;SUB&gt;p&lt;/SUB&gt; ≃ 30 EeV.</style></abstract></record></records></xml>