Origin of very high- and ultra-high-energy cosmic rays
نویسندگان
چکیده
منابع مشابه
Ultra High Energy Cosmic Rays
The current status of Ultra High Energy Cosmic Rays (UHECR) is reviewed, with emphasis given to theoretical interpretation of the observed events. The galactic and extragalactic origin, in case of astrophysical sources of UHE particles, have the problems either with acceleration to the observed energies or with the fluxes and spectra. Topological defects can naturally produce particles with ene...
متن کاملUltra High Energy Cosmic Rays
The origin of the particles in the highest energy end of the cosmic ray spectrum is discussed in the context of the wider problem of the origin of the whole cosmic radiation as observed at the Earth. In particular we focus our attention on the acceleration problem and on the transition from galactic to extragalactic cosmic rays.
متن کاملUltra High Energy Cosmic Rays
We discuss theoretical issues and experimental data that brought the ultra high energy cosmic rays in the list of Nature’s greatest puzzles. After many years of research we still do not know how astrophysical acceleration processes can reach energies exceeding 10 GeV. The main alternative top-down mechanism postulates the existence of super massive X-particles that create a particle spectrum ex...
متن کاملUltra High Energy Cosmic Rays: origin and propagation
We discuss the basic difficulties in understanding the origin of the highest energy particles in the Universe the ultrahigh energy cosmic rays (UHECR). It is difficult to imagine the sources they are accelerated in. Because of the strong attenuation of UHECR on their propagation from the sources to us these sources should be at cosmologically short distance from us but are currently not identif...
متن کاملOn the Origin of Ultra High Energy Cosmic rays (UHECR)
We reproduce statistical analyses of HiRes and AGASA data on the clustering and correlation of UHECR, we discuss the techniques used, there significance, and their validity, and we describe the application of these techniques on the future data obtained for the Pierre Auger collaboration, in the search for the origin of UHECR.
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ژورنال
عنوان ژورنال: Comptes Rendus Physique
سال: 2014
ISSN: 1631-0705
DOI: 10.1016/j.crhy.2014.02.008