Ultra-high-energy cosmic rays from black hole jets of radio galaxies

被引：99

作者：

Dermer, C. D. ^{[1
]}

Razzaque, S. ^{[1
]}

Finke, J. D. ^{[1
]}

Atoyan, A. ^{[2
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

[2] Concordia Univ, Montreal, PQ H3G 1M8, Canada

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

ACTIVE GALACTIC NUCLEI; BACKGROUND-RADIATION FIELDS; X-RAY; CENTAURUS-A; GAMMA-RAYS; GEV EMISSION; TEV BLAZARS; SPECTRUM; BURSTS; PKS-2155-304;

D O I：

10.1088/1367-2630/11/6/065016

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Auger Collaboration reports (Auger Collaboration 2007 Science 318 939, The Pierre Auger Collaboration 2008 Astropart. Phys. 29 188) that the arrival directions of greater than or similar to 60 EeV ultra-high-energy cosmic rays (UHECRs) cluster along the supergalactic plane and correlate with active galactic nuclei (AGN) within approximate to 100 Mpc. The association of several events with the nearby radio galaxy Centaurus A supports the paradigm that UHECRs are powered by supermassive black-hole engines and accelerated to ultra-high energies in the shocks formed by variable plasma winds in the inner jets of radio galaxies. The GZK horizon length of 75 EeV UHECR protons is approximate to 100 Mpc, so that the Auger results are consistent with an assumed proton composition of the UHECRs. In this scenario, the sources of UHECRs are FR II radio galaxies and FR I galaxies like Cen A with scattered radiation fields that enhance UHECR neutral-beam production. Radio galaxies with jets pointed away from us can still be observed as UHECR sources due to deflection of UHECRs by magnetic fields in the radio lobes of these galaxies. A broadband similar to 1 MeV-10 EeV radiation component in the spectra of blazar AGN is formed by UHECR-induced cascade radiation in the extragalactic background light. This emission is too faint to be seen from Cen A, but could be detected from more luminous blazars.

引用

页数：20

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