Energy spectrum of fast second order Fermi accelerators as sources of ultra-high-energy cosmic rays

被引：9

作者：

Winchen, Tobias ^{[1
]}

Buitink, Stijn ^{[1
]}

机构：

[1] Vrije Univ Brussel, Pl Laan 2, B-1050 Brussels, Belgium

来源：

ASTROPARTICLE PHYSICS | 2018年 / 102卷

基金：

欧洲研究理事会;

关键词：

UHECR; Acceleration of particles; Fermi-acceleration; Cosmic ray sources; Spectrum; Hillas' Plot; INTERSTELLAR TURBULENCE; PARTICLE-ACCELERATION; SCATTERING; LOBES; LIGHT;

D O I：

10.1016/j.astropartphys.2018.04.004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Stochastic acceleration of cosmic rays in second order Fermi processes is usually considered too slow to reach ultra-high energies, except in specific cases. In this paper we present the energy spectrum obtained from second order Fermi acceleration in highly turbulent magnetic fields as e.g. found in the outskirts of AGN jets in situations where it can be sufficiently fast to accelerate particles to the highest observed energies. We parametrize the resulting non-power-law spectra and show that these can describe the cosmic ray energy spectrum and mass-composition data at the highest energies if propagation effects are taken into account. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：25 / 31

页数：7

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