Origin and propagation of extremely high-energy cosmic rays

Bhattacharjee, Pijushpani; Sigl, G.

doi:10.1016/s0370-1573(99)00101-5

Cited by 692 publications

(767 citation statements)

References 391 publications

(754 reference statements)

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“…In order to investigate the behavior of MAF under the alternative hypothesis of an underlying anisotropic distribution of objects, we generate anisotropic maps of 10 4 skies, by varying the number of events from 20 to 100. In general, the anisotropy of a sky depends on several factors: for instance, in the case of cosmic rays, it depends on the distribution of sources, on magnetic fields and on propagation effects as energy loss or the GZK cutoff [21,22] (and Ref. therein).…”

Section: Statistical Analysis Of Mafmentioning

confidence: 99%

“…Catalog of candidate sources. Although several models for production mechanisms of UHECR are available [21,22] (and Ref. therein), [23][24][25][26][27][28][29][30], it is generally accepted that the candidate sources are extragalactic and trace the distribution of luminous matter on large scales [31]. In particular, it has been shown that correlation with possible high redshift sources is unlikely [32], whereas compact sources are favored [33,34]: the recent result reported by the P. Auger Collaboration experimentally supports the latter claim, showing an high correlation between the observed data and the distribution of nearby active galactic nuclei (AGN) [35,36].…”

Section: Statistical Analysis Of Mafmentioning

confidence: 99%

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Anisotropy studies with multiscale autocorrelation function

Domenico¹,

Lyberis²

2011

Nuclear Physics B - Proceedings Supplements

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We present a novel method, based on a multiscale approach, for detecting anisotropy signatures in the arrival direction distribution of the highest energy cosmic rays. This method is catalog independent, i.e. it does not depend on the choice of a particular catalog of candidate sources, and it provides a good discrimination power even in presence of contaminating isotropic background. We present applications to simulated data sets of events corresponding to plausible scenarios for events detected, in the last decades, by world-wide surface detector-based observatories for charged particles.

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Section: Statistical Analysis Of Mafmentioning

confidence: 99%

Section: Statistical Analysis Of Mafmentioning

confidence: 99%

Anisotropy studies with multiscale autocorrelation function

Domenico¹,

Lyberis²

2011

Nuclear Physics B - Proceedings Supplements

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“…Most of past and present ν detector are tracing muon in underground detectors [2], [1]. This because of proliferous, penetrating nature of the muon.…”

Section: Past Neutrino Telescope Undergroundmentioning

confidence: 99%

UHE Cosmic Rays and Neutrinos Showering on Planet Edges

Fargion

Oliva

Lanciano

2007

Nuclear Physics B - Proceedings Supplements

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Ultra High Energy (UHE) Cosmic Rays, UHECR, may graze high altitude atmosphere leading to horizontal upward air-showers. Also PeVs electron antineutrino hitting electron in atmosphere may air-shower at W boson resonant mass. On the other side ultra high energy muon and electron neutrinos may also lead, by UHE neutrinos mass state mixing, to the rise of a corresponding UHE Tau neutrino flavor; the consequent UHE tau neutrinos, via charge current interactions in matter, may create UHE taus at horizons (Earth skimming neutrinos or Hor-taus) whose escape in atmosphere and whose consequent decay in flight, may be later amplified by upward showering on terrestrial, planetary atmospheres. Indeed because of the finite terrestrial radius, its thin atmosphere size its dense crust, the UHE tau cannot extend much more than 360 kilometers in air, corresponding to an energy of about 7.2 EeV, near but below GZK cut-off ones; on the contrary Jupiter (or even Saturn) may offer a wider, less dense and thicker gaseous layer at the horizons where Tau may loose little energy, travel longer before decay and rise and shower at 4-6 10^{19} eV or ZeV extreme energy. Titan atmosphere may open a rare window of opportunity for Up-ward Taus at PeVs. Also solar atmosphere may play a role, but unfortunately tau-showers secondaries maybe are too noisy to be disentangled, while Jupiter atmosphere, or better, Saturn one, may offer a clearer imprint for GZK (and higher Z-Burst) Tau showering, well below the horizons edges.Comment: 8 pages, 16 Figures, CRIS 200

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“…Many top-down scenarios predict a dominance of photons in the CR flux above 10 20 eV (for a review see [1]), while according to classical acceleration scenarios in this energy range the CR flux should consist mainly of hadrons. Thus, any experimental conclusions about a fraction of photons in UHECR, e.g.…”

Section: Photons As Uhecr?mentioning

confidence: 99%