High-energy gamma rays and neutrinos from nearby radio galaxies

被引：8

作者：

Blanco, Carlos ^{[1
,2
]}

Hooper, Dan ^{[2
,3
,4
]}

机构：

[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[3] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA

[4] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2017年 / 11期

基金：

美国国家科学基金会;

关键词：

ultra high energy cosmic rays; ultra high energy photons and neutrinos; active galactic nuclei; neutrino astronomy; COSMIC-RAYS; EMISSION; CENTAURUS; M87; ACCELERATION; ABSORPTION; FLUX;

D O I：

10.1088/1475-7516/2017/12/017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Multi-messenger data suggest that radio galaxies (i.e. non-blazar active galaxies) are a well-motivated class of sources for the diffuse flux of high-energy neutrinos reported by the IceCube Collaboration. In this study, we consider the gamma-ray spectrum observed from four nearby radio galaxies (Centaurus A, PKS 0625-35, NGC 1275 and IC 310) and constrain the intensity and spectral shape of the emission injected from these sources, accounting for the effects of attenuation and contributions from electromagnetic cascades (initiated both within the radio galaxy itself and during extragalactic propagation). Assuming that this gamma-ray emission is generated primarily through the interactions of cosmic-ray protons with gas, we calculate the neutrino flux predicted from each of these sources. Although this scenario is consistent with the constraints published by the IceCube and ANTARES Collaborations, the predicted fluxes consistently fall within an order of magnitude of the current point source sensitivity. The prospects appear very encouraging for the future detection of neutrino emission from the nearest radio galaxies.

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页数：29

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