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Neutrino production in blazar radio cores
O. E. Kalashev, P. Kivokurtseva, S. Troitsky
Models of the origin of astrophysical neutrinos with energies from TeVs to PeVs are strongly constrained by multimessenger observations and population studies. Recent results point…
On the contribution of cosmic-ray interactions in the circumgalactic gas to the observed high-energy neutrino flux
Oleg Kalashev, Nickolay Martynenko, Sergey Troitsky
Cosmic rays escaping the Milky-Way disk interact with circumgalactic gas which fills the virial volume of our Galaxy. These interactions should produce guaranteed fluxes of energet…
Upper limit on the diffuse extragalactic radio background from GZK photon observation
Graciela B. Gelmini, Oleg Kalashev, Dmitri Semikoz
Here we point out that an observation of Ultra-High Energy Cosmic Ray (UHECR) photons, "GZK photons", could provide an upper limit on the level of the Extra-Galactic Radio Backgrou…
First High-speed Video Camera Observations of a Lightning Flash Associated with a Downward Terrestrial Gamma-ray Flash
R. U. Abbasi, M. M. F. Saba, J. W. Belz +146
In this paper, we present the first high-speed video observation of a cloud-to-ground lightning flash and its associated downward-directed Terrestrial Gamma-ray Flash (TGF). The op…