Implications of ultra-high-energy cosmic rays for transient sources

Kohta Murase, Hajime Takami

Research output: Contribution to conferencePaperpeer-review


The origin of ultra-high-energy cosmic rays (UHECRs) is one of the biggest mysteries in astroparticle physics. We study the possibility that UHECRs come from transient sources, propagating in the Galactic and intergalactic space. Based on the recent observational results, we estimate upper and lower bounds on the rate of transient UHECR sources and required isotropic cosmic-ray energy input per burst as 0:1 Gpc¡3 yr¡1 < Â0 < 103:5 Gpc¡3 yr¡1 and 1049:5 ergs < Eiso HECR < 1054 ergs, through constraining the apparent burst duration, i.e., dispersion in arrival times of UHECRs. Then, we discuss implications of proposed transient candidates such as gamma-ray bursts and active galactic nuclei. Especially, we demonstrate expected spectra of cumulative high-energy neutrinos and ultra-high-energy gamma rays from individual nearby transient sources.

Original languageEnglish (US)
StatePublished - Jan 1 2009
Event31st International Cosmic Ray Conference, ICRC 2009 - Lodz, Poland
Duration: Jul 7 2009Jul 15 2009


Other31st International Cosmic Ray Conference, ICRC 2009

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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