منابع مشابه
Cosmic Rays above 10 14 eV
We briefly review the status of cosmic ray studies between 10 14 eV and the highest observed energies, namely a few times 10 20 eV. Because of the rather low incident fluxes in this energy range, the studies mostly rely on ground based, large aperture detectors reconstructing the cosmic ray's properties through the detection of the air-showers they generate by interacting with the atmosphere. W...
متن کامل0 Can Gamma Ray Bursts Produce the Observed Cosmic Rays Above 10 20 eV ?
It has been suggested that cosmological γ-ray bursts (GRBs) can produce the observed flux and spectrum of cosmic rays at the highest energies. However, recent observations indicate that the redshift distribution of GRBs most likely follows that of the star formation rate in the universe, a rate which was much higher at redshifts 1.5-2 than it is today. Thus, most GRBs are at high redshifts. As ...
متن کاملAtmospheric Calorimetry above 10 eV: Shooting Lasers at the Pierre Auger Cosmic-Ray Observatory
The Pierre Auger Cosmic-Ray Observatory uses the earth’s atmosphere as a calorimeter to measure extensive air-showers created by particles of astrophysical origin. Some of these particles carry joules of energy. At these extreme energies, test beams are not available in the conventional sense. Yet understanding the energy response of the observatory is important. For example, the propagation di...
متن کاملCan Gamma Ray Bursts Produce the Observed Cosmic Rays Above 10 20 eV ?
It has been suggested that cosmological γ-ray bursts (GRBs) can produce the observed flux and spectrum of cosmic rays at the highest energies. However, recent observations indicate that the redshift distribution of GRBs most likely follows that of the star formation rate in the universe, a rate which was much higher at redshifts 1.5-2 than it is today. Thus, most GRBs are at high redshifts. As ...
متن کامل30TH INTERNATIONAL COSMIC RAY CONFERENCE HiRes Limits on Point-Like Sources of Cosmic Rays with Energy Above 10 eV
Point-like excesses have been alternately claimed and refuted in the direction of Cygnus X-3, BL-Lacertae objects, and others. We conduct a search for point-like deviations from isotropy in the arrival direction of ultra-high energy cosmic rays in the monocular data set collected by the High-Resolution Fly’s Eye. We find no evidence for point-like excesses and place a 90% c.l. upper limit of 0....
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1987
ISSN: 0004-9506
DOI: 10.1071/ph870423