A shell like kilometer spaced array or a honey comb one around Icecube

Fargion, Daniele; Lucentini, Pier Giorgio De Sanctis; Khlopov, Maxim Yu.

doi:10.22323/1.395.1207

Cited by 3 publications

(6 citation statements)

References 11 publications

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“…The ZeV scatterinng could be leading to Z resonant bosons. The secondary decay of such ultrarelativistic Z boson, may shine as a final UHECR nucleon and antinucleon, observed finally on Earth as a minor UHECR clustering along the 3C 454 source [4].…”

Section: Discussionmentioning

confidence: 99%

“…hundred Mpc [4]. There is a possibility that the heavier UHECRs such as NI, Co, Fe are mostly bent, twisted and even contained in spiral paths within halos of their own origin.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, for a more in-depth understanding of the phenomenon we have to consider not only the distribution of the possible sources, but also the history of the CR, the timing of the detected signals, the delay due to the randomwalk [4], each of them setting specific limits to the allowed energy windows.…”

Section: Introductionmentioning

confidence: 99%

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UHECR Signatures and Sources

2023

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We discuss recent results on the clustering, composition and distribution of Ultra-High Energy Cosmic Rays (UHECR) in the sky; from the energy of several tens of EeV in the dipole anisotropy, up to the highest energy of a few narrow clusters, those of Hot Spots. Following the early UHECR composition records deviations from proton we noted that the UHECR events above 40 EeV can be made not just by any light or heavy nuclei, but mainly by the lightest ones as He,D, Li,Be. The remarkable Virgo absence and the few localized nearby extragalactic sources, such as CenA, NGC 253 and M82, are naturally understood: lightest UHECR nuclei cannot reach us from the Virgo distance of twenty Mpc, due to their nuclei fragility above a few Mpc distances. Their deflection and smearing in wide hot spots is better tuned to the lighter nuclei than to the preferred proton or heavy nuclei candidate courier. We note that these lightest nuclei still suffer of a partial photodistruction even from such close sources. Therefore, their distruption in fragments, within few tens EeV multiplet chain of events, have been expected and later on observed by Auger collaboration, nearly a decade ago. These multiplet presences, strongly correlate with the same CenA, NGC253 sources. The statistical weight of such correlation is reminded. We conclude that the same role of NGC 253 clustering at lower energies could also feed the Auger dipole anisotropy at lower energy ranges. Such lower energy anisotropy could be fed and integrated by nearest Vela, Crab, LMC and Cas A contributes. In our present UHECR model, based on lightest nuclei in local volumes of a few Mpcs, closest AGN, Star-Burst or very close SNR are superimposing their signals, frozen in different epochs, distances and directions, feeding small and wide anisotropy. Possible tests to confirm, or untangle the current model from alternative ones, are suggested and updated.

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Section: Discussionmentioning

confidence: 99%

“…hundred Mpc [4]. There is a possibility that the heavier UHECRs such as NI, Co, Fe are mostly bent, twisted and even contained in spiral paths within halos of their own origin.…”

Section: Discussionmentioning

confidence: 99%

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UHECR Signatures and Sources

2023

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“…Various effects arise from the charge separation, depending on the orientation of the magnetic field relative to the direction of the shower axis. Analytical calculations and the proposal of several novel detection techniques exploiting this effect where carried out in [10].…”

Section: Lateral Distribution Of the Radio Signalmentioning

confidence: 99%

Radio-Emission from Atmosphere-Skimming Cosmic-Ray Showers in High-Altitude Balloon-Borne experiments

Tueros,

Cabana-Freire,

Alvarez-Muñiz

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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Atmosphere-skimming showers are initiated by cosmic rays above the Earth's horizon with incoming directions such that the development of the cascade occurs fully inside the atmosphere. Radio pulses induced by this type of showers have already been observed in balloon-borne experiments such as ANITA, but a characterization of their properties is lacking. The extreme range of densities in which these cascades can develop gives rise to a wide range of shower profiles, with characteristics of the radio emission that can differ significantly from those of regular downward-going showers. To study this type of event, we have used the ZHAireS-RASPASS program, a custombuilt modification to the well-known ZHAireS suite capable of simulating atmosphere-skimming showers and calculating their associated radio emission. We have studied the interplay between the magnetic field and atmospheric density profile in the expected signal, focusing on the detection of these events by experiments flying over Antarctica. A new asymmetry in the spatial distribution of the electric field has been identified as a consequence of the very long distances over which the shower particles propagate in the Earth's magnetic field (the coherence asymmetry). This asymmetry adds to (but is independent of) the already expected diffractive asymmetry, that is a consequence of the propagation of the radio signal through an index of refraction gradient. Finally we briefly discuss the implications of these peculiar characteristics on the expected exposure of balloon-borne experiments, and provide an estimation of the most probable energy for events detected by ANITA IV.

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“…Little progress has been done on understanding the influence that these effects can have on the detection of AS cascades through their radio, fluorescence or Cherenkov signatures. Some analytical calculations and the proposal of several novel detection techniques where carried by D. Fargion and collaborators [6], but detailed Monte Carlo simulations of these type of events where still missing, due to the lack of microscopic shower simulation tools capable of handling these geometries. Enter ZHAireS-RASPASS.…”

Section: Introductionmentioning

confidence: 99%

Simulation of radiopulses from Atmosphere-Skimming Extensive Air Showers with ZHAireS-RASPASS

Tueros¹

2023

Proceedings of 9th International Workshop on Acoustic and Radio EeV Neutrino Detection Activities — PoS(ARENA2022)

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Earth-skimming neutrinos and Atmosphere-skimming neutrinos or cosmic rays can induce extensive air showers that present some peculiarities in comparison to the better-characterized down-going showers. For some geometries, cascades can take place high in the atmosphere and develop over several hundred of kilometers, giving ample time for the geomagnetic field to deflect the particles. For other geometries, cascades can develop very close to the ground where the density is high and the resulting cascades are very short. Development in a thinner or denser atmosphere will shift the balance between the average interaction length and decay length of particles, giving showers that can have very different hadronic/electromagnetic components with respect to regular down-going showers. In this article we will showcase ZHAireS-RASPASS, a custom-built modification to the ZHAireS suite capable of simulating Atmosphere-Skimming and up-going (from Earth-skimming) showers and their radio-emission, focusing on how it could be used to inform the design and data interpretation of balloon-borne and satellite-borne experiments.

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A shell like kilometer spaced array or a honey comb one around Icecube

Cited by 3 publications

References 11 publications

UHECR Signatures and Sources

UHECR Signatures and Sources

Radio-Emission from Atmosphere-Skimming Cosmic-Ray Showers in High-Altitude Balloon-Borne experiments

Simulation of radiopulses from Atmosphere-Skimming Extensive Air Showers with ZHAireS-RASPASS

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