Ultrahigh-Energy Photons as a Probe of Nearby Transient Ultrahigh-Energy Cosmic-Ray Sources and Possible Lorentz-Invariance Violation

Journal Article · Fri Aug 21 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.081102· OSTI ID:21364610

Murase, Kohta ^[1]

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1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

Detecting neutrinos and photons is crucial to identifying the sources of ultrahigh-energy cosmic rays (UHECRs), especially for transient sources. We focus on ultrahigh-energy gamma-ray emission from transient sources such as gamma-ray bursts, since >EeV gamma rays can be more direct evidence of UHECRs than approxPeV neutrinos and GeV-TeV gamma rays. We demonstrate that coincident detections of approx1-100 events can be expected by current and future UHECR detectors such as Auger and JEM-EUSO, and the detection probability can be higher than that of neutrinos for nearby transient sources at < or approx. 50-100 Mpc. They may be useful for constraining the uncertain cosmic radio background as well as knowing the source properties and maximum energy of UHECRs. They can also give us more than 10{sup 4} times stronger limits on the Lorentz-invariance violation than current constraints.

• OSTI ID: 21364610
• Journal Information: Physical Review Letters, Vol. 103, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.103.081102; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMIC GAMMA BURSTS
COSMIC RAY SOURCES
EEV RANGE
EMISSION
GAMMA RADIATION
GEV RANGE
LORENTZ INVARIANCE
NEUTRINOS
PHOTONS
PROBABILITY
TEV RANGE
BOSONS
COSMIC RADIATION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
PRIMARY COSMIC RADIATION
RADIATIONS