Bounds on the origin of extragalactic ultrahigh energy cosmic rays from the IceCube neutrino observations

Abstract

We study general implications of the IceCube observations in the energy range from $10^6$ GeV to $10^{10}$ GeV for the origin of extragalactic ultrahigh energy cosmic rays assuming that high energy neutrinos are generated by the photomeson production of protons in the extragalactic universe. The PeV-energy neutrino flux observed by IceCube gives strong bounds on the photomeson-production optical depth of protons in their sources and the intensity of the proton component of extragalactic cosmic rays. The neutrino flux implies that extragalactic cosmic-ray sources should have the optical depth greater than $\sim 0.01$ and contribute to more than a few percent of the observed bulk of cosmic rays at 10 PeV. If the spectrum of cosmic rays from these extragalactic sources extends well beyond 1 EeV, the neutrino flux indicates that extragalactic cosmic rays are dominant in the observed total cosmic-ray flux at 1 EeV and above, favoring the dip transition model of cosmic rays. The cosmic-ray sources are also required to be efficient neutrino emitters with the optical depth close to unity in this case. The highest energy cosmic-ray ($\sim 10^{11}$ GeV) sources should not be strongly evolved with redshift to account for the IceCube observations, suggesting that any cosmic-ray radiation scenarios involving distant powerful astronomical objects with strong cosmological evolution are strongly disfavored. These considerations conclude that none of the known extragalactic astronomical objects can be simultaneously a source of both PeV and trans-EeV energy cosmic rays. We also discuss a possible effect of cosmic-ray propagation in magnetized intergalactic space to the connection between the observed total cosmic-ray flux and neutrino flux.

14 pages, 6 figures, to appear in Physical Review D

References in corpus (12)

• Turbulence and Magnetic Fields in the Large Scale Structure of the Universe
• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• Cosmogenic Neutrinos: parameter space and detectabilty from PeV to ZeV
• High energy neutrino early afterglows from gamma-ray bursts revisited
• Do long-duration GRBs follow star formation?
• Cosmogenic neutrinos as a probe of the transition from Galactic to extragalactic cosmic rays
• Acceleration of Ultra-High Energy Cosmic Rays in the Colliding Shells of Blazars and GRBs: Constraints from the Fermi Gamma ray Space Telescope
• High-energy neutrinos from reverse shocks in choked and successful relativistic jets
• Diffusion of Cosmic Rays in the Expanding Universe. II. Energy Spectra of Ultra-High Energy Cosmic Rays
• Implications to Sources of Ultra-high-energy Cosmic Rays from their Arrival Distribution
• A global autocorrelation study after the first Auger data: impact on the number density of UHECR sources
• The Production of Ultra High Energy Cosmic Rays during the Early Epochs of Radio-loud AGN

Cited by in corpus (5)

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• Hadronic origin of multi-TeV gamma rays and neutrinos from low-luminosity active galactic nuclei: implications of past activities of the Galactic center
• Constraining photohadronic scenarios for the unified origin of IceCube neutrinos and ultrahigh-energy cosmic rays
• Identifying High Energy Neutrino Transients by Neutrino Multiplet-Triggered Followups
• Testing unified models for the origin of ultrahigh-energy cosmic rays and neutrinos: Multimessenger approaches with x-ray observations