Linking high-energy cosmic particles by black-hole jets embedded in large-scale structures
By K. Fang, Kohta Murase. 2017
142 citations recorded by the source corpus.
The origin of ultrahigh-energy cosmic rays (UHECRs) is a half-century-old enigma1. The mystery has been deepened by an intriguing coincidence: over ten orders of magnitude in energy, the energy generation rates of UHECRs, PeV neutrinos and isotropic sub-TeV γ-rays are comparable, which hints at a grand unified picture2. Here we report that powerful black hole jets in aggregates of galaxies can supply the common origin for all of these phenomena. Once accelerated by a jet, low-energy cosmic rays confined in the radio lobe are adiabatically cooled; higher-energy cosmic rays leaving the source interact with the magnetized cluster environment and produce neutrinos and γ-rays; the highest-energy particles escape from the host cluster and contribute to the observed cosmic rays above 100 PeV. The model is consistent with the spectrum, composition and isotropy of the observed UHECRs, and also explains the IceCube neutrinos and the non-blazar component of the Fermi γ-ray background, assuming a reasonable energy output from black hole jets in clusters.A model that accounts for the high-energy neutrino, gamma-ray and ultrahigh-energy cosmic-ray emissions is proposed, suggesting that they emerge from the cosmic rays accelerated by the black-hole jets in galaxy clusters.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/db67e41d3820a946f94cadfd94e0b62e1b3a007a
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Citations in the corpus
- Open Questions in Cosmic-Ray Research at Ultrahigh Energies (2019, unknown): “For AGN, the longest timescale which may be associated to particle acceleration is the jet activity timescale, estimated to be of the order 300 Myr (Wykes et al., 2013).”
- IceCube-Gen2: the window to the extreme Universe (2020, background): “B) The PeV universe: Precision measurements of the neutrino flux can test the idea of cosmic particle unification, in which sub-TeV γ-rays, PeV neutrinos, and UHE cosmic rays can be explained simultaneously [48–51].”
- A Multimessenger Picture of the Flaring Blazar TXS 0506+056: Implications for High-energy Neutrino Emission and Cosmic-Ray Acceleration (2018, background): “…multimessenger studies have provided important clues to the origins of the diffuse neutrino, γ-ray, and cosmic-ray backgrounds (Murase et al. 2013; Fang & Murase 2018), and offer a powerful approach for identifying transient or highly variable neutrino sources, including blazar flares (Dermer et…”