@article {21768,
	title = {Self-consistent neutrino and UHE cosmic ray spectra from Mrk 421},
	volume = {54},
	year = {2014},
	month = {2014/02/1},
	pages = {61 - 66},
	abstract = {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<SUB>ν,peak</SUB> = 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<SUB>ν,peak</SUB> ≃ 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<SUB>p</SUB> ≃ 30 EeV.},
	keywords = {active galactic nuclei, Astrophysics - High Energy Astrophysical Phenomena, Gamma ray emission, Photo hadronic interactions, radiation mechanisms: non-thermal, Sources of extraterrestrial neutrinos, Ultrahigh energy cosmic rays},
	isbn = {0927-6505},
	url = {https://ui.adsabs.harvard.edu/abs/2014APh....54...61D},
	author = {Dimitrakoudis, Stavros and Petropoulou, Maria and Mastichiadis, Apostolos}
}
