The Astrophysics of Ultrahigh-Energy Cosmic Rays

Kotera, Kumiko; Olinto, Angela V.

doi:10.1146/annurev-astro-081710-102620

Cited by 419 publications

(442 citation statements)

References 312 publications

(393 reference statements)

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“…NTA satisfies the requirement of detecting cosmogenic neutrino at 100 PeV by assuming the appropriate duty cycle. The flux of neutrino can be theoretically inferred from what we already know, but with a large amount of uncertainties, depending on source spectrum and on spatial distribution and cosmological evolution of PeV sources [2]. If EHECRs are heavy nuclei like, the yield of the cosmogenic neutrino is strongly suppressed [3].…”

Section: Our Strategy: Telescope To Be Used For Exploring Pev-eev Unimentioning

confidence: 99%

Ashra Neutrino Telescope Array (NTA): Combined Imaging Observation of Astroparticles — For Clear Identification of Cosmic Accelerators and Fundamental Physics Using Cosmic Beams —

Sasaki

Kifune

2017

Proceedings of the 7th International Workshop on Very High Energy Particle Astronomy in 2014 (VHEPA2014)

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In VHEPA (very high energy particle astronomy) 2014 workshop, focused on the next generation explorers for the origin of cosmic rays, held in Kashiwa, Japan, reviewing and discussions were presented on the status of the observation of GeV-TeV photons, TeV-PeV neutrinos, EeV-ZeV hadrons, test of interaction models with Large Hadron Collider (LHC), and theoretical aspects of astrophysics. The acceleration sites of hadrons, i.e., sources of PeV-EeV cosmic rays, should exist in the universe within the GZK-horizon even in the remotest case. We also affirmed that the hadron acceleration mechanism correlates with cosmic ray composition so that it is important to investigate the acceleration mechanism in relevance to the composition survey at PeV-EeV energy. We regard that LHC and astrophysics theories are ready to be used to probe into hadron acceleration mechanism in the universe. Recently, IceCube has reported detection of three events of neutrinos with energies around 1 PeV and additional events at lower energies, which significantly deviate from the expected level of background events. It is necessary to observe GeV-TeV photon, EeV-ZeV hadron and TeV-PeV neutrino all together, in order to understand hadronic interactions of cosmic rays in the PeV-EeV energy region. It is required to make a step further toward exploring the PeV-EeV universe with high accuracy and high statistics observations for both neutrinos and gamma rays simultaneously, by using the instrument such as Ashra Neutrino Telescope Array (NTA). Wide and fine survey of gamma-rays and neutrinos with simultaneously detecting Cherenkov and fluorescence light with NTA will guide us to a new intriguing stage of recognizing astronomical objects and non-thermal phenomena in ultra-high energy region, in addition, new aspect about the fundamental concepts of physics beyond our presently limited understanding; the longstanding problem of cosmic ray origin, the radiation mechanism of gamma-rays, neutrino and cosmic rays from violent objects like blazars, interaction of gamma-rays and cosmic rays with microwave and infrared background photons, and PeV-EeV neutrinos originated from far places beyond the GZK-horizon.

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Section: Our Strategy: Telescope To Be Used For Exploring Pev-eev Unimentioning

confidence: 99%

Ashra Neutrino Telescope Array (NTA): Combined Imaging Observation of Astroparticles — For Clear Identification of Cosmic Accelerators and Fundamental Physics Using Cosmic Beams —

Sasaki

Kifune

2017

Proceedings of the 7th International Workshop on Very High Energy Particle Astronomy in 2014 (VHEPA2014)

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“…[19,24], the resulting model-independent 90% CL limit on neutrino fluxes with Standard Model cross-sections [22] is shown in Fig. 3.…”

Section: Expected Signals Uhe Neutrinosmentioning

confidence: 99%

A Search for Ultra-High Energy Neutrinos and Cosmic-Rays with ANITA-2

Mottram¹

2012

Springer Theses

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“…The experimental and theoretical study of UHECR have brought several important results, such as [1,2,3]: (i) UHECRs are charged particles, with limits on neutral particles up to 10 19 eV at the level of few percent for photons and well below for neutrinos [4,5,6], (ii) the spectra observed on Earth show a slight flattening at energies around 5 × 10 18 eV (called the ankle), with (iii) a steep suppression at the highest energies around 10 20 eV.…”

Section: Introductionmentioning

confidence: 99%

Ultra High Energy Cosmic Rays and Neutrinos

Aloisio

2016

Nuclear and Particle Physics Proceedings

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We discuss the production of ultra high energy neutrinos coming from the propagation of ultra high energy cosmic rays and in the framework of top-down models for the production of these extremely energetic particles. We show the importance of the detection of ultra high energy neutrinos that can be a fundamental diagnostic tool to solve the discrepancy in the observed chemical composition of ultra high energy cosmic rays and, at the extreme energies, can unveil new physics in connection with the recent cosmological observations of the possible presence of tensor modes in the fluctuation pattern of the cosmic microwave background.

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The Astrophysics of Ultrahigh-Energy Cosmic Rays

Cited by 419 publications

References 312 publications

Ashra Neutrino Telescope Array (NTA): Combined Imaging Observation of Astroparticles — For Clear Identification of Cosmic Accelerators and Fundamental Physics Using Cosmic Beams —

Ashra Neutrino Telescope Array (NTA): Combined Imaging Observation of Astroparticles — For Clear Identification of Cosmic Accelerators and Fundamental Physics Using Cosmic Beams —

A Search for Ultra-High Energy Neutrinos and Cosmic-Rays with ANITA-2

Ultra High Energy Cosmic Rays and Neutrinos

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