Measurements and implications of cosmic ray anisotropies from TeV to trans-EeV energies
| Autor: | Olivier Deligny |
|---|---|
| Přispěvatelé: | Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Small scale anisotropies
Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Cosmic ray magnetic field Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences UHE cosmic radiation: anisotropy Large scale anisotropies External data 0103 physical sciences Anisotropy 010303 astronomy & astrophysics Cosmic rays High Energy Astrophysical Phenomena (astro-ph.HE) Physics density 010308 nuclear & particles physics Astronomy and Astrophysics Galaxy Magnetic field cosmic radiation: angular distribution cosmic radiation: galaxy Astrophysics - High Energy Astrophysical Phenomena [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
| Zdroj: | Astropart.Phys. Astropart.Phys., 2019, 104, pp.13-41. ⟨10.1016/j.astropartphys.2018.08.005⟩ |
| DOI: | 10.1016/j.astropartphys.2018.08.005⟩ |
| Popis: | Important observational results have been recently reported on the angular distributions of cosmic rays at all energies, calling into question the perception of cosmic rays a decade ago. These results together with their in-progress interpretations are summarised in this review paper, covering both large-scale and small-scale anisotropies from TeV energies to the highest ones. While the magnetic field in the Galaxy has long been considered as an external data imprinting a quasi-random walk to particles and thus shaping the angular distributions of Galactic cosmic rays through the induced average density gradient, the information encompassed in the angular distributions in the TeV--PeV energy range appear today as a promising tool to infer some properties of the local magnetic field environments. At the highest energies, the extragalactic origin of the particles has been recently determined observationally. While no discrete source of ultrahigh-energy cosmic rays has been identified so far, the noose is tightening around nearby extragalactic objects, and some prospects are discussed. Comment: Review paper to appear in Astropart. Phys., 63 pages, 22 figures |
| Databáze: | OpenAIRE |
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