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Constraints on the origin of ultra-high-energy cosmic rays from cosmogenic neutrinos and photons
Astroparticle physics Acceleration of particles Abundances Neutrinos Gamma-rays Relativistic processes
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2011/10/11
We study the production of cosmogenic neutrinos and photons during the extragalactic propagation of ultra-high-energy cosmic rays (UHECRs). For a wide range of models in cosmological evolution of sour...
The local energy production rates of GRB photons and of UHECRs
The local energy production rates GRB photons UHECRs
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2011/1/10
In a recent analysis it was found that the local (z=0) rate at which gamma-ray bursts (GRBs) produce energy in 1 MeV photons, Q_GRB(z=0), is 300 times lower than the local energy production rate in ul...
Ultrahigh-energy nuclei, photons, and magnetic fields
Ultrahigh-energy nuclei photons magnetic fields
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2011/1/10
Combined recent data from cosmic-ray detectors and gamma-ray detectors have produced some surprising insights regarding the sources of ultrahigh-energy cosmic rays (UHECRs), magnetic fields inside and...
Photoionization of the diffuse interstellar gas in spirals by lyman photons escaping from H II regions
Photoionization lyman photons interstellar gas H II regions
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2009/6/11
Photoionization of the diffuse interstellar gas in spirals by lyman photons escaping from H II regions。