Cosmic ray origin and anisotropy measurement by the Pierre Auger Observatory

IF 5.9 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Rivista Del Nuovo Cimento Pub Date : 2020-01-01 DOI:10.1393/NCC/I2019-19245-0

G. Sigl

引用次数: 0

Abstract

Recently the Pierre Auger Observatory has observed a dipolar anisotropy of amplitude 6.5% above 8 × 1018 eV that is unrelated to the Galactic plane. While the significance is largest above 8 × 1018 eV, the cosmic ray data indicate a growth of the dipolar amplitude from 4×1018 eV to 3.2×1019 eV and beyond. Furthermore, above 4 × 1019 eV, indications have been found for intermediate-scale anisotropies associated with extragalactic gamma-ray sources. Apart from those indications no other significant anisotropies are seen. We review these observations and discuss their relevance for the origin of ultra-high energy cosmic rays.

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皮埃尔·奥格天文台的宇宙射线起源和各向异性测量

最近，皮埃尔·奥格天文台观测到一个偶极各向异性，其振幅为6.5%，高于8 × 1018 eV，与银道面无关。虽然在8 ×1018 eV以上的显著性最大，但宇宙射线数据表明偶极振幅从4×1018 eV到3.2×1019 eV甚至更高。此外，在4 × 1019 eV以上，已经发现了与河外伽玛射线源相关的中等尺度各向异性的迹象。除这些迹象外，未见其他显著的各向异性。我们回顾了这些观测结果，并讨论了它们与超高能量宇宙射线起源的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rivista Del Nuovo Cimento 物理-物理：综合

CiteScore

9.50

自引率

2.20%

发文量

审稿时长

>12 weeks

期刊介绍： La Rivista del Nuovo Cimento is an international peer-reviewed journal. It publishes monographs in all fields of physics. These monographies aim at presenting the state of the art of topical subjects of relevant interest for the community. Usually, authors are invited and topics suggested by the Deputy Editors-in-Chief, but also spontaneous submissions are examined.