Propranolol in the Treatment of Postencephalitic Psychosis

Abraham, G; Jarrett, F. J.

doi:10.1177/070674379003500130

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…A possibility to reconcile these two conditions is that, for some reasons, the environment of local EHBL is different than that of more distant sources. However, a more intriguing possibility is based on the observed change of composition of UHECR with energy, from protons to heavier ions (iron), occurring around 10 19 eV (Abraham et al 2010). Although this result, involving extrapolations of hadronic interaction parameters at energies unaccessible in laboratory (e.g.…”

Section: Discussionmentioning

confidence: 99%

On the hadronic cascade scenario for extreme BL Lacs

Tavecchio

2014

Monthly Notices of the Royal Astronomical Society

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The peculiar high-energy emission spectrum of the so-called extreme BL Lacs (EHBL) challenges the standard emission models of blazars. Among the possible solutions, the so-called hadronic cascade scenario assumes that the observed high-energy radiation is produced in the intergalactic space through photo-hadronic reactions by ultra-high energy cosmic rays (UHECR) with energies up to 10 19−20 eV beamed by the blazar jet. Under the assumption -implicit in this model -that the intrinsic high-energy synchrotron-self Compton emission of the blazar does not substantially contribute to the observed γ-ray spectrum, we derive constraints to the basic physical quantities of the jet and we compare them with the requirements of the hadronic cascade scenario. We found that, for a plausible range of relativistic jet Doppler factors (δ = 10 − 50), the maximum achievable energy of the accelerated protons can exceed 2 × 10 19 eV with jet powers of the order of ≈ 10 44 erg s −1 , parameters compatible with the requests of the hadronic scenario even if EHBL are embedded in magnetic fields of cosmic filaments. We also discuss the consequences of our results for the possibility that local EHBL contribute to the observed UHECR.

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Section: Discussionmentioning

confidence: 99%

On the hadronic cascade scenario for extreme BL Lacs

Tavecchio

2014

Monthly Notices of the Royal Astronomical Society

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“…However, crossing the intergalactic magnetic field can further enhance the deflection between the arrival direction of super-GZK protons and the sky position of their actual sources to be ∼ 15 • (Ryu et al 2010). Additionally, if the UHECR flux is dominated by higher-Z particles, as suggested by data from the Pierre Auger Observatory (Abraham et al 2010;Aab et al 2013), then the deflection angle would be enhanced by a factor of Z. Thus, the large diffuse region of the TA hotspot is entirely consistent with emission from a single bright point source.…”

Section: The Icecube Neutrino Spectrummentioning

confidence: 99%

Is the Ultra-High Energy Cosmic-Ray Excess Observed by the Telescope Array Correlated With Icecube Neutrinos?

Fang

Fujii

Linden

et al. 2014

ApJ

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The Telescope Array (TA) has observed a statistically significant excess in cosmic-rays with energies above 57 EeV in a region of approximately 1150 square degrees centered on coordinates (R.A. = 146.7, Dec. = 43.2). We note that the location of this excess correlates with two of the 28 extraterrestrial neutrinos recently observed by IceCube. The overlap between the two IceCube neutrinos and the TA excess is statistically significant at the 2σ level. Furthermore, the spectrum and intensity of the IceCube neutrinos is consistent with a single source which would also produce the TA excess. Finally, we discuss possible source classes with the correct characteristics to explain the cosmic-ray and neutrino fluxes with a single source.

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