HIGH-ENERGY NEUTRINOS FROM SOURCES IN CLUSTERS OF GALAXIES

被引：12

作者：

Fang, Ke ^{[1
,2
]}

Olinto, Angela V. ^{[3
]}

机构：

[1] Univ Maryland, Dept Astron, 1105 PSC, College Pk, MD 20742 USA

[2] Joint Space Sci Inst, College Pk, MD 20742 USA

[3] Univ Chicago, Kavli Inst Cosmol Phys, Dept Astron & Astrophys, Chicago, IL 60637 USA

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 828卷 / 01期

基金：

美国国家科学基金会;

关键词：

astroparticle physics; galaxies: clusters: general; neutrinos; GAMMA-RAY EMISSION; LARGE-SCALE STRUCTURE; COSMIC-RAYS; MAGNETIC-FIELDS; SHOCK-WAVES; ICECUBE DATA; ACCELERATION; UNIVERSE; NUCLEI; TURBULENCE;

D O I：

10.3847/0004-637X/828/1/37

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

High-energy cosmic rays can be accelerated in clusters of galaxies, by mega-parsec scale shocks induced by the. accretion of gas during the formation of large-scale structures, or by powerful sources harbored in clusters. Once accelerated, the highest energy particles leave the cluster via almost rectilinear trajectories, while lower energy ones can be confined by the cluster magnetic field up to cosmological time and interact with the intracluster gas. Using a realistic model of the baryon distribution and the turbulent magnetic field in clusters, we studied the propagation and hadronic interaction of high-energy protons in the intracluster medium. We report the cumulative cosmic-ray and neutrino spectra generated by galaxy clusters, including embedded sources, and demonstrate that clusters can contribute a significant fraction of the observed IceCube neutrinos above 30 TeV while remaining undetected in high-energy cosmic rays and. rays for reasonable choices of parameters and source scenarios.

引用

页数：8

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